May 23-30 – Los Angeles - Two big concert tours hit Los Angeles this week. Madonna reinvents herself, costume-wise, at least five times during her new Re-Invention tour that kicked off in L.A. this week with Christina Aguilera and a contingent of Kabbalah rabbis in the audience on opening night. The concert has been critically maligned, and Madge promptly cancelled the next few performances due to illness. But she’ll be laughing on her way to the bank – the program includes lots of fan-pleasing mega-hits, and will probably sell out everywhere.

British chart-topper Dido brought her smooth style to L.A. with her first tour in three years. Much lower key than Madonna, Dido has her own fans, and legions of them: her 2003 album, Life for Rent, has gone eight times platinum.

New York – It was dueling parties on Tuesday with Jason Binn’s Gotham magazine kicking off its summer issue at SoHo bar 323 with Susan Sarandon, James Lipton, and Fabian Basabe. Dylan Lauren stopped by, then scooted over to the Lexington Avenue Armory where Julianne Moore, Hilary Swank, Gina Gershon, Rosie Perez, Clive Davis and Marisa Tomei celebrated the 100th anniversary of Cartier’s Santos watch. Wyclef Jean DJ’d after carrying wife Marie Claudinette over the threshold. Zac Posen and Claire Danes were there, but had to be alert the next day, when Posen appeared at the Laboratory Institute of Merchandising graduation. His muse Danes introduced him to the crowd at the Puck Building, but she refused to don a graduation cap.

On Thursday, Stevie Wonder got to relax and take in performances by India.Arie, Chaka Kahn, Stephanie Mills, Joan Osbourne and others. Wonder and first parents George and Barbara Bush were honored at the T.J. Martell award gala. How did India.Arie get involved with the program? “Anything that Stevie Wonder asks me to do, I do.”

With Jen Lowery in Los Angeles