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]

The Guest List

More

Jeremy Piven• Britney Spears• Cameron Diaz• Johnny Knoxville• Lucy Liu• Hugh Hefner• Adrien Brody• Estelle• chris martin• Mad Men• Mischa Barton• Gwen Stefani• Carly Steel• Taylor Jacobson• The Rachel Zoe Project• Olga Kurylenko• Christina Hendricks• Brad Goreski• Andy Garcia• Playboy Mansion• Kelly Lynch• Animal• Danny Huston• Mark Salling• Century City• Willa Ford• DJ Daisy O'Dell• DJ Spider• Kermit the frog• The Muppets• Bruno Mars• Tony Kaye• Matt Dallas• Kristen Ruhlin• Director's Guild of America• Rich Ross• Kimberly Cole• Liam McIntyre• Starz• Allie Gonino• Jennifer Woods• Miss Piggy• James Bobin• Christian Cooke• Katrina Law• Spartacus Vengeance• Leron Gubler• GROWZE• GROWZE launch• Playboy's $ex & Music Issue Celebration With Bruno Mars• Gonzo• Tawny Amber Young• Eve Mauro• Tenille Houston• Tribecca Film and Colleen Camp Host an Intimate Screening of Detachment with Adrien Brody and Director Tony Kaye• Tribecca Film• Colleen Camp• Detachment• Ron Yerxa• Creighton Fraker• Starz "Magic City" Los Angeles Premiere• Magic City• Jeffrey Dean Morgan• Viva Bianca• The Muppets Honored on the Hollywood Walk of Fame• Lisa Henson• Fozzie• Pepe• Sweetums Walter• The Muppets Movie• El Capitan Theater• GROWZE launch party• Playboy Bruno Mars Party