Star Magazine hosts the Hollywood Rocks party with Paris and Perez at Playhouse; Gwyneth Paltrow, Kim Kardashian and Stacy Keibler celebrate the opening of Tracy's Anderson's new fitness flagship studio; celebs and man's best friend party in an Anthropologie for Amber Riley's A Letter To My Dog book signing; Drew Barrymore and Lucky Magazine host the FABB West event for guests like Julianne Hough and Christa B. Allen; Dan Deacon and Tom Kuntz debut their "Bugs" exhibition at Sonos Studios—see who was out at Thursday's top events in this edition of Last Night's Parties.

Ben Affleck, Steven Tyler, Naomi Watts, Nina Dobrev and a massive list of celebs came out to support designer John Varvatos' 10th Annual Stuart House Benefit; Cara Santana, Jesse Metcalfe, Jordana Brewster, and co-stars of "Dallas" step out for a Q&A panel at the 30th Annual PaleyFest; Shenae Grimes, Sarah Hyland, Derek Hough, Lakers stars and other notables tested their luck for a good cause at the Lakers Casino Night Fundraiser benefiting the Lakers Youth Foundation; Julie Bowen, Ginnifer Goodwin, Adam Scott and a bunch of little kids read some books at the 4th Annual Milk And Bookies Story Time Celebration—see which stars were out and about supporting the causes of their choice over the weekend in this edition of Last Night's Parties.

Miley Cyrus, Adam Lambert, Ciara, Jenna Dewan-Tatum and a slew of other famous songbirds and familiar faces light up the "VH1 Divas" concert; Silver Linings Playbook wins big at the 17th Annual Satellite Awards; Megan Fox, Ed Helms and Jessica Alba announce the nominees for the 2013 Golden Globe Awards; Anne Hathaway and Amanda Seyfried help honor Hugh Jackman at his Hollywood Walk Of Fame Star presentation—get caught up on L.A.'s top events from Thursday through the weekend in this installment of Last Night's Parties.

Michael C. Hall, Jon Voight, Matt LeBlanc and more stars from the popular Showtime series gather in Beverly Hills to celebrate the holidays; Usher, Amber Riley and more tribute Scooter Braun, Jane Lynch and Caren Brooks at the Southern California's ACLU Bill of Rights Dinner; Justin Bieber, Ke$ha, Psy and more perform for the second night of KIIS Jingle Ball; Betty White and adorable four-legged friends help celebrate the first anniversary of Love & Leashes at Westside Pavilion—find out more about L.A.'s top events from Monday in this installment of Last Night's Parties.

Jason Moore, Anna Kendrick, Rebel Wilson, Elizabeth Banks, Max Handleman [via]

Elizabeth Banks, Anna Kendrick and Brittany Snow come together at the premiere of Jason Moore's new movie Pitch Perfect; Chris Paul shows up with his wife and family to celebrate his GQ's October issue cover; "Dancing With The Stars" cast members grab some cocktails at Mixology 101 after last night's performance episode—join us as we bring you up to speed on Monday's top red carpet events in this installment of Last Night's Parties.

Ben Stiller and Jonah Hill celebrate the Hollywood premiere of The Watch; Britney Spears and other stars of FOX's fall lineup take the hot seat at the TCA's Summer Press Tour; FOX throws their All-Star Party at Soho House for stars like Zooey Deschanel, Seth MacFarlane, Katy Perry and other locals with great taste in music go see Haim open for The xx in Hollywood—here's how L.A. pretty much covered all the entertainment industry bases Monday with movies, TV and music in this installment of Last Night's Parties. More»

Ben Stiller, Christine Taylor, Jonah Hill and more celebrate the Hollywood premiere of The Watch; Mindy Kaling, Britney Spears and other stars of FOX's fall lineup take the hot seat at the TCA's Summer Press Tour; FOX throws their All-Star Party at Soho House for stars like Lea Michele, Zooey Deschanel and Seth MacFarlane; Katy Perry and other locals with great taste in music go see Haim open for The xx in Hollywood—here's how L.A. pretty much covered all the entertainment industry bases Monday with movies, TV and music in this installment of Last Night's Parties. More»

Elizabeth Banks, Jessica Alba, Zac Posen and more talk fashion at the Annenberg Community Beach House; stylists and tastemakers attend the opening of the new L.A. Montblanc boutique; Shailene Woodley, Laura Leighton and other stars of ABC Family light up the red carpet at the network's West Coast Upfronts; Diane Lane, Kathy Griffin, Gloria Steinem and more celebrate the anniversaries of Ms. Magazine and the Feminist Majority Foundation at the Beverly Hills Hotel; Amber Riley faints (but is okay now) on the red carpet with her co-stars at a special screening of Fox's Glee—it's been a bustling couple of days here in Los Angeles and we have the details on what went down Monday and Tuesday for you in this two-day installment of Last Night's Parties. More»

Over the weekend in NYC, Abbie Cornish celebrated the premiere of her film "The Girl" with Shaun White, Emma Watson showed up head to toe in Miu Miu for the "Struck by Lightning" premiere, Eric Bana partied at Abe & Arthurs for the "Deadfall" after party, Jason Segal and Michelle Williams cozied up together at yet another after party, and more! Last night's parties were all about getting down at the Tribeca Film Festival. More»

Jaime King, Fergie and Chloe Moretz attend JustJared.com founder, Jared Eng's birthday party at Pink Taco; Ke$ha, Rose McGowan and Sophia Bush honor entertainment media that raises awareness on animal issues at the 26th Annual Genesis Awards; Kendra Wilkinson and Kim Kardashian celebrate Perez Hilton's birthday with a Mad Hatter-themed tea party at Siren Studios—the rain didn't stop Los Angeles from partying this weekend and we've got the details on the biggest events and the celebrities who attended them in this installment of Last Night's Parties! More»

Jean Dujardin beats George Clooney for best actor and Mary Tyler Moore receives lifetime achievement award at the 18th Annual Screen Actors Guild Awards; Sofia Vergara and Meryl Streep have fun with friends at the Weinstein Company and Dewar's post-SAG Awards cocktail party at the Chateau Marmont; Amber Heard dazzles fans on the red carpet as Kelsey Grammer hosts the 64th Annual Directors Guild of America Awards; Katy Perry and professional party girl Paris Hilton kick off the grand opening of 1 OAK Las Vegas; More»