Arnold Schwarzenegger and Tim Tebow attend the Los Angeles premiere of Act of Valor at the ArcLight Cinemas in Hollywood; Uggie, the loveable pup from The Artist wins top honors at the first ever Golden Collar Awards; Shepard Fairey, Weird Al Yankovic and Mark Hoppus attend "The Simpsons" 500th Episode Celebration at the Hollywood Roosevelt Hotel—Los Angeles was still popping off after a jam-packed weekend of Grammy parties and we have the details on what went down and who braved another round of events on Monday in this edition of Last Night's Parties!

[Jean Dujardin, Uggie via]

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The Guest List

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Arnold Schwarzenegger• Anika Noni Rose• Sonja Morgan• The Simpsons• Shepard Fairey• Jesse Metcalfe• Wendie Malick• hollywood blvd• The Roosevelt• Kirk Hammett• The Roosevelt Hotel• Mark Hoppus• Lisa VanderPump• Matt Groening• Estella Warren• Hyatt Regency Century Plaza• Tricia Helfer• Michael Clarke Duncan• Omarosa Manigault-Stallworth• Pauley Perrette• Tim Tebow• ArcLight Hollywood• Danny Trejo• Kristin Bauer• Yeardley Smith• Ryan Kavanaugh• Courtney Hansen• Tommy Chong.• Eric Winter• Roselyn Sanchez• Missi Pyle• Tucker Tooley• Beth Grant• James Cromwell• The Artist• Uggie the dog• Weird Al Yankovic• ArcLight Cinemas• act of valor• Michael Lerner• Christopher Schwarzenegger• Jonathon Schaech• First Annual Golden Collar Awards• "The Simpsons" 500th Episode Celebration• Nancy Cartwright• Evanna Lynch• Act Of Valor Premiere• Golden Collar Awards• Uggie• The Simpsons 500th episode party