A wise record mogul once said, “The only constant in the music industry is change.”

The summer concert festival circuit is no different, as some of the usuals are back (Lilith Fair, Ozzfest), some are dead (Lollapalooza, Further Festival, Smokin’ Grooves) and some are still unsure (HORDE).

But traveling roadshows aren’t what are making the headlines this season.

Woodstock ’99, the fourth Tibetan Freedom Festival and more radio station festivals than you shake a Backstreet Boy at, are expected to draw the biggest crowds this summer.

Lollapalooza, the Perry Farrell-created influential tour that took alternative rock to the masses in 1991, recently canceled a 1999 tour after months of setbacks, but promises to return in 2000 after a two-year hiatus.

HORDE, which struck gold last summer with the Barenaked Ladies, has not yet confirmed if there will be a 1999 tour, and Further Festival, which debuted last year to showcase the bands of former Grateful Dead members, canceled its 1999 plans due to Phil Lesh’s December liver transplant.

Locally, Starfest and Hawkfest, two of last summer’s radio station festival contenders, have been put to rest.

Dotfest is a go, but organizers are behind schedule in announcing performers, while Mancow’s Lazer Luau is also in the works, but no information has been released.

Without further ado, here is the skinny on the hottest summer tours, festivals and local radio station shows.

If there’s one piece of advice I can give you … always wear sunscreen.

Dotfest

When: June 12

Where: Ankeny Airfield

Who: Artists will be announced next week.

What: KKDM, central Iowa’s borderline alternative radio station (one must question Madonna’s “Ray of Light”), jumped on the station-sponsored concert festival bandwagon two years ago with the original Dotfest, which featured the Bloodhound Gang, Jill Sobule, Reel Big Fish and several others.

The station made Dotfest a tradition last year (with Everclear as a headliner) and plans to host another Dotfest in June.

No rumors have leaked about performers, but bands on unusually high rotation are always good possibilities. Remember hearing “Sex and Candy” 10 times a day a year ago?

Tickets: Information will be released next week.

Guinness Fleadh

When: Four dates in June.

Where: New York City (June 26 at Randall’s Island), Boston (June 19 at Suffolk Downs), Chicago (June 12 at Chicago Motor Speedway) and San Francisco (June 5 at Golden Gate Park).

Who: Van Morrison, Elvis Costello, Hootie and the Blowfish, Ben Harper and the Innocent Criminals, Lucinda Williams, The Cardigans, Altan, John Lee Hooker, Taj Mahal, Shawn Mullins, John Prine, Frances Black, The Saw Doctors, Richard Thompson, Young Dubliners, The Drovers, Dave Alvin and more.

What: Sponsored by America’s favorite Irish brew, The Guinness Fleadh (pronounced flah) is a celebration of Ireland featuring a wide array of Irish and American music.

Boasting four stages, the festival hosts several up-and-coming Irish bands, traditional Celtic sounds and an Irish Village commemorating the renaissance of Irish Culture.

Not all the performers are Irish, but they all drink Guinness.

Tickets: $45 to $60 plus fees, at Ticketmaster outlets.

Hard Rock RockFest

When: June 5

Where: Atlanta Motor Speedway in Atlanta, Ga.

Who: Better Than Ezra, Collective Soul, Eve 6, Everlast, Live, Marvelous 3, New Radicals, Silverchair, Sugar Ray, The Mighty Mighty Bosstones, The Offspring and Third Eye Blind.

What: How can so many big names play for such a cheap price? Sponsorship, baby, and this concert has a host of them.

Oldsmobile Alero, Certs, Circuit City, Discover Card and Entertainment Weekly are among the big name brands whoring themselves to music fans via Rockfest.

But what do businesses get out of sponsoring concert festivals?

“Hard Rock RockFest is hip, relevant and edgy, and is just the right venue for Oldsmobile and the Alero to communicate that we are indeed new and different,” Oldsmobile General Manager Karen Francis says on RockFest Web site.

Corporate America sucks, but we’ll take the concerts.

Tickets: $28.50 plus fees, at Ticketmaster outlets.

Lilith Fair

When: Begins July 8 in Vancouver and ends Aug. 31 in Edmonton, Ala.

Where: Midwest shows include Chicago (Aug. 19 at New World Music Theatre), Minneapolis (Aug. 25 at Canterbury Park) and Kansas City (Aug. 26 at Sandstone Amphitheater).

Who: Mainstage performers (though not all artists perform all dates) include Sarah McLachlan, Sheryl Crow, Dixie Chicks, Indigo Girls, Deborah Cox, Queen Latifah, Luscious Jackson, Martina McBride, Monica, Mya, Me’shell Ndegeocello, The Pretenders and Suzanne Vega. Second stage performers include Cibo Matto, K’s Choice, Beth Orton, Sixpence None The Richer and more.

What: In 1997, a Metallica-headlined Lollapalooza completely shunned women, throwing only alternative chicks Ruby and Beth Hart on the second stage. In retaliation, an underground Canadian phenomena by the name of Sarah McLachlan formed her own summer festival.

The Lilith Fair, which included McLachlan pals Jewel, Tracy Chapman, Juliana Hatfield, Joan Osborne and many others, was the top-grossing tour of the summer, ousting Lollapalooza, HORDE and the original Ozzfest.

Lilith Fair has since launched McLachlan’s career to amazing crests, as well as dozens of other women rockers.

Tickets: Not available.

Ozzfest

When: Begins May 27 in West Palm Beach, Fla. and ends July 24 in Devore, Calif.

Where: Midwest dates include Minneapolis (July 1 at Float Rite Park), Chicago (July 5 at New World Music Theatre) and Kansas City (July 9 at Sandstone Amphitheater).

Who: Mainstage acts include Black Sabbath, Rob Zombie, Deftones, Slayer, Primus, Godsmack and System Of A Down. Second stage acts include Fear Factory, Hed(pe), Puya, Slipknot, Pushmonkey, Drain and Static X.

What: Organizers are dubbing this year’s Ozzfest “The Last Supper,” as it promises to be the final tour for heavy metal pioneers Black Sabbath, whose winter tour was a monster draw.

Ozzfest was founded in 1997 by namesake Ozzy Osbourne and immediately scared the shit out of parents when the tour featured shock rockers of two generations — Ozzy and Marilyn Manson.

Last year’s Ozzfest featured several up-and-comers, including Limp Bizkit, Sevendust and Soulfly, along with veterans Tool and Megadeth.

Local music fans note the Des Moines thrash band Slipknot on the second stage. The band’s Ross Robinson-produced national debut will be released before summer.

Tickets: $45 to $70 plus fees, at Ticketmaster outlets.

Q101 Jamboree

When: May 22

Where: New World Music Theatre in Tinley Park, Ill.

Who: Red Hot Chili Peppers, Silverchair, The Offspring, Blondie, Hole, Local H, Orgy, Kottonmouth Kings and 2 Skinnee Js.

What: An alternative station festival that truly rocks — and the Cubs are in town.

Tickets: $32.25 plus fees, at Ticketmaster outlets.

Rockfest

When: June 15 to July 18

Where: Chippewa Valley in Cadott, Wis. (near Minneapolis).

Who: Thursday: America, Blue Oyster Cult, Lynyrd Skynyrd; Friday: Gov’t Mule, Kansas, The Scorpions, Motley Crue, Def Leppard; Saturday: Survivor, Rick Springfield, Pat Benatar, Poison, Sammy Hagar; Sunday: Edwin McCain, Joan Jett, Peter Frampton, Foreigner, Journey.

What: Rockers from the past four decades come together for this annual festival. Indeed a hidden secret, Rockfest is four days of cheap entertainment.

“Love me like a bomb, baby come and get it on.”

Tickets: Four day pass is $100. See www.rock-fest.com for more information.

Tibetan Freedom Festival

When: June 13

Where: Alpine Valley Music Theatre (90 miles outside of Chicago)

Who: Beastie Boys, Blondie, Biz Markie, Live, Outkast, The Roots, Otis Rush and Eddie Vedder

What: Beastie Boy Adam Yauch, a.k.a. King Ad Rock, held the first Tibetan Freedom Festival three years ago and featured a Who’s Who of alternative rock and rap.

Last year’s Washington D.C. show, which was plagued by a deadly lightning storm, included a political rally. This year, the Free Tibet Movement goes nation-wide with 24 hours of continuous music at four festivals held in Chicago, Sydney, Amsterdam and Tokyo. (Hence the two-day festival scaling down to one day.)

What will we do if Tibet is ever freed?

Tickets: Not available.

Van’s Warped Tour

When: Begins June 25 in Austin and ends July 31 in Miami.

Where: Midwest dates include Minneapolis (July 13) and Chicago (July 14 at New World Music Theatre or United Center).

Who: Full-timers include Black Eyed Peas, Blink 182, Bouncing Souls, Cypress Hill, Dropkick Murphys, Frenzal Rhomb, Grinspoon, H20, Less Than Jake, Molotov, Pennywise, Sevendust, Suicidal Tendencies and The Living End. Part timers include Agnostic Front, Atomic Fireballs, Buck O Nine, BR549, Lit, Spring Heeled Jack, Zebrahead and more.

What: A skate punk heaven, Van’s Warped Tour features punk and hard-core bands, along with the nation’s top boarders. (Veteran Steve Caballero is touring this year.)

Tickets: $24.75 plus fees, at Ticketmaster outlets.

Woodstock ’99

When: July 23 to July 25

Where: Griffiss Park in Rome, N.Y.

Who: Aerosmith, Bush, The Chemical Brothers, George Clinton, Collective Soul, Counting Crows, Creed, Sheryl Crow, DMX, Everlast, Fatboy Slim, Foo Fighters, Guster, Mickey Hart’s Planet Drum, Ice Cube, Jamiroquai, Jewel, Korn, Limp Bizkit, Live, Los Lobos, Dave Matthew’s Band, Metallica, Moe, Alanis Morissette, Willie Nelson, Our Lady Peace, Rage Against the Machine, Red Hot Chili Peppers, Rusted Root, Brian Setzer Orchestra, Sugar Ray, The Offspring, The Tragically Hip, Wylcef Jean and the Refugee Allstars and more.

What: The ultimate celebration of peace, love and rock ‘n’ roll is turning 30 and most of the best live bands around will be on hand to celebrate.

Woodstock ’99 looks to be a worthy successor to the ’94 festival, which like the original, had all the mud baths and nudity it takes to celebrate peace.

Organizers are boasting the venue for this year’s event, saying it is well-equipped to handle the 250,000 campers expected for the weekend.

Most cities are offering bus trips to Woodstock ’99, averaging around $250 for the entire trip. A small price to pay for a moment in history.

Tickets: $150 plus fees, at Ticketmaster outlets.