Everyone knows extreme sports and rock go together like Oreos and milk. That's why this year's Gravity Games, which run September 7-9 in Providence, Rhode Island, will feature performances by Smash Mouth, Lit and the Mighty Mighty Bosstones.

The bands will each play a 90-minute set at the Downtown Waterplace Park,

and festival organizers expect between 45,000 and 50,000 people to attend

each night, according to a publicist for the event. Sevendust and Oleander played at

last year's Gravity Games and drew similar crowds.

The Bosstones will play on September 7, with the pop punk band Riddlin' Kids opening. The second day will be headlined by Smash Mouth, with melodic punk act Unwritten Law warming up the crowd. Lit will perform on the final day, and eclectic sonic combo Sound of Urchin will open that show.

Admission to all concerts and sporting events is free. Gravity Games 2001,

which showcases aggressive inline skating, downhill skateboarding, freestyle

motocross, stunt skateboarding and street luge, is expected to draw upwards

of 400,000 people over the three-day event.