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Ozzy met Slash, Obama hung with Bruce, Elvis Costello jammed with Jenny Lewis and Katy Perry introduced herself a giant phallic Chapstick. It was a week of secret shows (Fall Out Boy), cool benefits (the Who rocked for Michael J. Fox) and general weirdness (50 Cent chilling with Bette Midler). Click below to get in on the insanity:

• Random Notes: Britney & Madonna, Bono, Fall Out Boy and More