Here is a preview of Summerfest's fourth day:

One of the hottest summer tours comes to the festival. Fleetwood Mac is on tour supporting their new album, Say You Will. Stevie Nicks is still quite sexy, and Mick Fleetwood is still a freak. They'll be at the Marcus Amphitheater at 7:30.

Dark Star Orchestra is not your ordinary Grateful Dead tribute band. They don't just cover their songs, they cover entire concerts. As they put it:

When you're at a DSO show you may really be in the Providence Civic Center back in May of '81. Or you could even be at the 1973 Denver Coliseum show listening to Weather Report Suite. Who knows?

At 10:00, Blues Traveler dishes out the harmonica-laden jams at the Briggs & Stratton Big Backyard. Their latest is a live album called Live: What You and I Have Been Through.

Powerman 5000 entertain on the Mountain Dew Rock stage. Their latest is Transform. Band leader Spider One talks about how they tossed a newly-recorded album just weeks before it was to be released. Their show is at 10:00.

Cheap Trick has been around forever and are long-time Summerfest veterans. They play at the North Shore Bank Landing at 10:00. Their new album, Special One, comes out July 22.

Eve 6 plays the Miller Lite Oasis at 10:00. The latest news with them is lead singer/bass player Max Collins was arrested for public nudity. They also have a new album coming out July 22.