Halle Berry, Stacy Keibler, Mario Lopez and more host a  Run/Walk to raise money for women’s cancer research and treatment; James Franco curates a multimedia exhibition at the MOCA paying tribute to James Dean and his most classic film; Ben Affleck ponies up for Hank Azaria’s charity poker tournament in Westwood; “The Bachelor” Ben Flajnik brings his significant other, mother and sister for some serious Mother’s Day pampering at a rooftop event in Beverly Hills; Krysten Ritter and Shannon Elizabeth are on hand for the selection of the Swatch Art Rules contest winner and after party at Royal/T—it was a very full Mother’s Day weekend, and we’ve got all the details in this Monday edition of Last Night’s Parties! More»

Neil Patrick Harris and Missi Pyle step out to support Alan Cumming's foray into photography in West Hollywood; Josh Hutcherson, Busy Philipps, Perez Hilton and many more attend Logo's "NewNowNext Awards" show hosted by Kelly Osbourne; an extraordinarily random array of celebrities including Jennifer Lopez, James Caan and Tommy Hilfiger celebrate the grand opening of Planet Dailies and Mixology 101; Jessica Lowndes and Paul Sorvino hit the premiere of their new short horror film—get your final rundown of who partied in L.A. before for the weekend in this edition of Last Night's Parties. More»

The 54th Annual Grammy Awards takes over the Staples Center; Paris Hilton and Afrojack attend EMI's Grammy after party; Tony Bennett and Diana Krall perform at Clive Davis and The Recording Academy's Pre-Grammy Gala; Ne-Yo and Compound Entertainment throw a Pre-Grammy midnight brunch; Kelly Clarkson and John Legend attend Sony Music Group's Grammy Reception at Cecconi's; Bruno Mars performs at Warner Music Group's Grammy Celebration hosted at Chateau; Jay-Z's Roc Nation holds a pre-Grammy brunch at Soho House; MusiCares honors Paul McCartney as person of the year and raises $6.5 million for artists; Cash Money Records holds their 3rd annual pre-Grammy Awards party with Lil Wayne and Drake; Flo-Rida and Pia Toscano rock the house at OK! Magazine's pre-Grammy event—Los Angeles was alive with music this weekend and we've got your inside scoop on all the festivities and the celebrities who attended them in this edition of Last Night's Parties! More»

HBO kicked things off at Circa 55, where guests like Jane Fonda, Guy Pearce, and Ewan McGregor, and winner Claire Dane munched on beef tenderloin and sipped martinis. NBC had A-listers Jon Hamm, Colin Firth, and Nicole Richie schmoozing under the stars at the Beverly Hilton rooftop - right across from where Harvey Weinstein kept the company of Golden Globe winners Meryl Streep and Jean Dujardin, as well as Leo DiCaprio and countless other guests at his annual party. See this and so much more on our Golden Globes after party round up... MORE>>

After the awards ceremony winded down, celebrities dispersed into the night and the red carpets were rolled out yet again, mostly decking the halls of the Beverly Hilton, where the majority of Sunday's after parties were held. HBO kicked things off at Circa 55, where guests like Jane Fonda, Guy Pearce, and Ewan McGregor, and winner Claire Dane munched on beef tenderloin and sipped martinis. NBC had A-listers Jon Hamm, Colin Firth, and Nicole Richie schmoozing under the stars at the Beverly Hilton rooftop - right across from where Harvey Weinstein kept the company of Golden Globe winners Meryl Streep and Jean Dujardin, as well as Leo DiCaprio and countless other guests at his annual party. More»

From Betty White to Robert Pattinson, it was raining stars at the People's Choice Awards; Shenae Grimes and Stephanie Pratt attend the opening of a Swiss timepiece flagship on Melrose; Liam Neeson, Kristen Bell and fellow faces of the big screen hit the downtown premiere of The Grey; Michelle Williams, Bradley Cooper, Lindsay Lohan and more celebrate awards season with the Weinstein Co. and Audi at Chateau—we have your details on how red carpet season kicked into high gear this week in this installment of Last Night's Parties. More»

Kate Hudson, Cameron Diaz, Drew Barrymore [via]

Michelle Williams, Jennifer Garner and more attend special screenings of their films showing in the 2011 AFI Fest; Robert Pattinson, Jon Hamm and more honor the work of those behind the scenes in entertainment; the first ever LACMA Art + Film gala co-hosted by Leonardo DiCaprio brings out one of the most star-studded crowds we've ever seen, with everyone from Zac Efron, Clint Eastwood and Zoe Saldana, to Stevie Wonder, Julian Schnabel and Jane Fonda—we, could keep going but we'll stop there, so come take a look at everything that went down this busy weekend in L.A. in a super-size edition of Last Night's Parties.

Go HERE for more photos of the event by Morgan Silva and tag yourself and your friends!

Last night celebrities and guests gathered at the Hammerstein Ballroom for the Keep A Child Alive's 8th Annual Black Ball. Alicia Keys, a co-founder of the foundation, performed for guests and even hosted an impromptu auction of 2 18-karat gold bracelets she was wearing - each sold for $14,000. Guests also enjoyed live performances by Norah Jones, Usher and Will.I.Am. More»

Lovecat Magazine Party

Go HERE to see more pictures by Ruben N and tag yourself and your friends!

Leave it to Lovecat to spice up Fashion Week with a funky fresh night out.The female frenzy mag celebrated at Le Bain last night in regards to their most recent issue that features Lindsay Lohan.   More»