Emmy Rossum, Diane Kruger, Bryan Cranston and loads of other celebs step out for BTJA's Third Annual Critics' Choice Awards; Rob James-Collier, Elizabeth McGovern, and the other "Downton Abbey" stars strut the red carpet for An Evening with "Downton Abbey"; Shay Mitchell, Tyler Blackburn, and the rest of the "Pretty Little Liar's" cast hit the Paley Center's "Pretty Little Liars" event; Dennis Quaid, George Lopez, Danny Masterson and more step onto the green at the Screen Actor's Guild 4th Annual Los Angeles Golf Classic—read all about Monday's top events in this edition of Last Night's Parties.

David Arquette and Carmen Electra kick it with Perez Hilton at his CD release party at Bootsy Bellows; Caroline D'Amore, Diana Madison, and L.A. media mavens step out for the Rev New Media open house; Courtney Stodden, Shekhar Rahate, and Buzz Aldrin hit up Dr. Ava Cadell's Sizzling Sexy Summer Event; Jennifer Morrison, Vanessa Hudgens, and Audrina Patridge get their hair styled at the Nine Zero One Salon; Julia Louis-Dreyfus, Amy Smart, Ed Begley Jr., and other environmentalist notables support Heal the Bay's Bring Back the Beach Annual Gala; Kerry Washington, Katie Lowes and "Scandal" co-stars walk the red carpet for the season finale celebration—get your final L.A. event rundown of the week in this edition of Last Night's Parties.

Diane Keaton and John C. Reilly fete photographer Matthew Rolston's new book; Vera Farmiga and her "Bates Motel" costars spend an evening with The Paley Center; Halle Berry, Andy Garcia, and Julie Bowen help lead the way at the EIF Revlon Run/Walk for Women; Demi Lovato, Adam Levine, Britney Spears and dozens of other pop stars hit KIIS FM's Wango Tango; Tyler Perry, Angela Bassett and Lisa Vanderpump waltz through the CARRY Foundation's annual "Shall We Dance" Gala; John Legend joins Stevie Wonder for his 63rd birthday celebration—get caught up on the weekend's top happenings in this edition of Last Night's Parties.

Jessica Alba, Drew Barrymore, Katy Perry and other celebs clad in red, white and blue attend the opening of the Tommy Hilfiger West Coast Flagship; Hollywood darlings Michelle Williams and Mila Kunis walk the yellow brick road with James Franco and Zach Braff at the premiere of Oz The Great And Powerful; Kate Bosworth, Kim Kardashian, Jennifer Lopez, Lionel Richie and a slew of fashionable guests hit the opening party for Topshop Topman at Cecconi's; Eva Longoria, Naomi Watts and Minnie Driver, along with hotel aficionados from Conde Nast Traveler celebrate The Leading Hotels of the World 85th Anniversary—get the details on Wednesday's top L.A. events in this installment of Last Night's Parties.

Paris Hilton and David Arquette celebrate the launch of a new male modeling agency at Bootsy Bellows; Maria Shriver helps honor Rob Lowe with the Anti-Defamation League at the Beverly Hilton; Lucy Hale, Tyler Blackburn and the cast of "Pretty Little Liars" hit a special screening of their Halloween episode in the Hollywood Forever Cemetery—we have the rundown on Tuesday's top events around town in this installment of Last Night's Parties.

Zoe Kazan and Paul Dano celebrate the premiere of their movie, Ruby Sparks at the Egyptian Theatre; Al Green die-hards experience some old time lovin' and soul at The Greek with performer Allen Stone; KIIS FM, Teen Choice and Backstage Creations keep the teenage dream alive with awesome swag bags at their pre-award show gifting lounge; Stephen Verona, Arno Elias and Maggie Coulombe combine forces for a night of beauty and art at Mouche Gallery presents "Escape With Me"--goodies and beauty and music, oh my! We've got the scoop on Thursday in this edition of Last Night's Parties. More»

Busy Philipps, Zoe Deschanel, Ginnifer Goodwin [via]

Ginnifer Goodwin, Christina Hendricks, Zoe Deschanel and Judd Apatow help honor the finest achievements in TV; Alessandra Ambrosio and Christina Milian have their tots in tow at the Brave premiere; Keira Knightley, Drew Barrymore and Steve Carell step out for a screening of their new film; Ashley Tisdale and more hit  the viewing party for Bravo's "Miss Advised"—it was another busy Monday in L.A. with various events all over town, and we have all the details on what happened in this installment of Last Night's Parties. More»

Hollywood's biggest stars let their hair down on Sunday night for the 2012 MTV Movie Award where Twilight and Hunger Games win big; Gwen Stefani and sons Zuma and Kingston attend the Elizabeth Glaser Pediatric AIDS Foundation's 23rd Annual "A Time For Heroes"; Victoria Beckham and Reese Witherspoon step out to Greystone Mansion in Beverly Hills on Sunday for some family fun, to benefit the One Voice Scholars; Spike TV hosts their 6th Annual Guy's Choice Awards where stars like Justin Timberlake, Emma Stone and Kobe Bryant all go home with well-deserved awards; Ashley Tisdale and Audrina Patridge hit the Colgate Optic White Beauty Bar at 901 Salon for some pre-MTV Movie Awards pampering; Paris and Nicky Hilton attend a private birthday party for Allison Melnick—it was another action-packed weekend of summertime fun here in L.A. and we've got all the details on what went down and who partied where in this edition of Last Night's Parties. More»