George Clooney belts out "Sweet Caroline" with Neil Diamond for Jane Fonda, Stacy Keibler and Nicky Hilton; Brian Grazer is honored by the Alfred Mann Foundation; Dita Von Teese, Marisa Tomei and Kristin Davis fete Cameron Silver's new fashion tome at Chateau Marmont; Jon Hamm, Anna Faris, Jeremy Renner and others attend the Reel Stories, Real Lives fundraiser; Travis Barker, Hugh Hefner and Brody Jenner help Snoop celebrate his birthday at the Playboy Mansion—it was quite the weekend here in L.A. and we have the rundown on the biggest and best events that went down in this edition of Last Night's Parties.

David Duchovny, Emmy Rossum, Sophia Bush and many more hit The CW, CBS and Showtime's Summer TCA Tour Party; Claire Danes and Bryan Cranston step out for the 28th Annual Television Critics Association Awards in Beverly Hills; Maria Menounos and Derek Hough show off their fancy footwork at a charity gala; Nigel Lythgoe joins the British Consul at her home for a launch celebration of the London Olympics—get the rundown of the weekend's biggest events around L.A. in today's installment of Last Night's Parties. More»

Jessica Alba and Elisabetta Canalis enjoy a day at L.A.'s premier luxury baby and toddler show; The Actors' Fund honors Tony Award winner Jason Alexander at a viewing party; Courteney Cox hosts the Vintage Hollywood Fundraiser at her ex-husband's home; Hollywood’s most stunning starlets hit the 11th annual Chrysalis Butterfly Ball in Brentwood; Julianne Hough, Tom Cruise and cast-mates pose on the red carpet for the ‘Rock Of Ages’ world premiere — it was yet another event-filled weekend in L.A. and we have the details on who partied where in this edition of Last Night's Parties.

Tom Cruise & Julianne Hough at the Rock of Ages premiere [via]

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Hollywood heavyweights of all ages including Jennifer Aniston, Jack Nicholson, Dakota Fanning, Meryl Streep and Julia Roberts step out to help honor Shirley MacLaine; Stephanie Pratt, Derek Hough and more single famous faces party with OK! Magazine at Roxbury; Jamie Chung, Taryn Manning and others hit E3 to support the fight against AIDS with a night of gaming; Vanessa Williams is honored at the Covenant House California's annual gala—it was yet another bustling Thursday across L.A. and we have the lowdown on who partied where in this installment of Last Night's Parties. More»

Jack Black and Shirley McLaine ham it up for the cameras at the premiere of their new movie; Kim Kardashian, Busy Philipps and more step out for Us Weekly's Hot Hollywood Style Issue event at Greystone; ASCAP presents their 2012 Pop Music awards to Katy Perry, Carly Simon, David Guetta and others; Emma Roberts and Julia Roberts make a movie premiere a stylish family affair; Rihanna sings for Steven Spielberg, Rita Wilson and many others in Hollywood to benefit breast cancer research—L.A. was hopping with events all over town Wednesday night and we have your details on the best ones that went down in this edition of Last Night's Parties. More»

Lady Gaga, LL Cool J, and Katy Perry celebrate the nominees of the 2012 Grammys with a concert and after party; Amy Smart and Patti Stanger step out for the launch of a new jewelry collection at private cocktail party in Beverly Hills; Robert Downey Jr., Helen Mirren, Warren Beatty, Ben Stiller and others attend the 2011 BAFTA L.A. Britannia Awards—Miami is popping off with Art Basel, but there was still plenty of action in L.A. on Wednesday, so get all the details in this edition of Last Night's Parties.

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Will we ever need another romantic comedy after this one? After all, "Valentine's Day" seems to incorporate every possible cliche about love, using every possible "romantic comedy" actor or actress. Nevertheless, the stars of the film, oblivious to the fact that they may have ushered in the end of a genre, were out in full force last night in perhaps the schmaltziest of Hollywood premieres in a long time... More»