Last Night's Parties: Bruno Mars Covers Led Zeppelin, James Brown For Britney Spears & Gwen Stefani At The Playboy Mansion & More!

by Dena Silver · March 21, 2012

Bruno Mars plays a private show of James Brown and Journey covers for Gwen Stefani, Cameron Diaz, Britney Spears and more at the Playboy Mansion; Taylor Jacobson and Mischa Barton step out for the opening of the new GROWZE boutique; Adrien Brody attends the intimate screening of his film Detachment; Miss Piggy, Kermit, and the rest of their Muppet crew are immortalized with a star on the Hollywood Walk of Fame—Tuesday was popping all over Los Angeles and we have the details on what went down in this edition of Last Night's Parties!

[Bruno Mars performing at the Playboy Mansion last night via Twitter by @pietrinooo]