Santana, a hot ticket after his Grammy Awards sweep, is on tour with Macy Gray. Sting, Steely Dan, Tina Turner, Don Henley, No Doubt and Pearl Jam are on the road, and Bruce Springsteen is wrapping up a yearlong reunion with the E Street Band.

Then there are the perennials, acts that seem to tour every year but still have a big following: Dylan, the Allman Brothers Band, the Moody Blues and Jimmy Buffett. Nostalgic fans can also hear Def Leppard, Poison and the Go-Go’s.

Double bills that should prove popular include the Red Hot Chili Peppers touring with the Foo Fighters, Counting Crows with Live, and Natalie Merchant with Wilco.

Industry analysts say Ross’ tour is shaping up as the summer’s biggest disaster. It is suffering from spotty ticket sales and terrible publicity, after two original Supremes refused to join because they weren’t getting paid enough.