Sophia Bush, Gillian Zinser and a slew of others join Blake Mycoskie for the opening of the TOMS flagship on Abbot Kinney in Venice; Demi Lovato, Britney Spears, Simon Cowell and other "X Factor" personalities hit the season finale press conference; Logan Lerman, Ariane Bellamar and more step out for the annual Working Dreams And Families For Children holiday party—get the rundown on Monday's top events in L.A. in this edition of Last Night's Parties.

Go HERE for more photos by Erada and tag yourself and your friends!

The spirit of fresh talent in the arts was once again the central theme to The Art of Elysium's 4th Annual GENESIS event which drew a collection of guests like Ali Larter, Rumer Willis and David Arquette among the stylish Angelenos who came out to celebrate.

Click HERE for more photos by Jessica Turner and tag yourself and your friends!

Sure, there were tons of Coachella events this weekend, but there was only one where relaxing by the pool and doing DIY projects were the main attractions: the Planet Blue X FOAM Magazine 'Gimme Shelter' Pool Party of course. Located at Alcazar Hotel in Palm Springs, the party was hosted by style icon and "90210" star Gillian Zinser. In addition to a festival-themed lookbook and magazine spread, the party completed the joint Coachella Initiative project created by FOAM and Planet Blue. More»

You know it's that time of year again and you know we canvas the Coachella party scene better than anyone—FACT. As my colleague Mikey Glazer over at The Wrap pointed out, the people responsible for the barrage of pool parties and events surrounding the festival all decided Weekend 1 over Weekend 2 was for them. From the third annual Neon Carnival and VIP gifting lounges, to literally dozens of daytime pool parties, there are more events to hit this weekend than ever and we're here again to help you prioritize. Except for the one a certain athletic wear brand and print-heavy fashion designer famously throw every year but asked not to be included because they're just too special, we present to you the complete list of the best and most exclusive parties in the desert this weekend in our annual Coachella 2012 Weekend Party Guide. More»

Fergie and Josh Duhamel celebrate the launch of Don "DB" Brooks' Don-A-Matrix Training method; AnnaLynne McCord is honored at the Drawing Hope International Masquerade Gala; "Grey's Anatomy" hosts The Songs Beneath The Show benefit party; the beautiful people of "90210" have a Season 4 wrap party at Pink Taco; Jane Lynch hosts the kick-off event for Adopt The Arts; Julia Roberts and Lily Collins step out for the Los Angeles premiere of Mirror Mirror—St. Patrick's Day wasn't the only reason to have a party over the weekend, and we've got all the details on the biggest events that went down in Los Angeles and the notables who attended them in this edition of Last Night's Parties! More»

Amy Adams and Malin Ackerman attend Vanity Fair's 20th Anniversary Party; Taylor Swift and Zac Efron attend the L.A. premiere of "Lorax"; Bryan Cranston and Joel McHale honor writers; Emmanuelle Chriqui, Lance Bass and others perform in a 24 hour stage production; David Beckham wins at Cartoon Network's Hall Of Game Awards; Sofia Coppola hosts a launch party at Sowden House for the new Marni for H&M Collection—awards season is still in full swing and we've got the details on the weekend's parties in and around Los Angeles and the stars who attended in this edition of Last Night's Parties! More»

Jeffrey Katzenberg, Chris Miller, Salma Hayek, Antonio Banderas

Salma Hayek and Antonio Banderas help launch Awards Season at Chateau; Dolly Parton and Queen Latifah hit their Hollywood movie premiere; Patrick Dempsey attends the McLaren Beverly Hills opening; Disney ABC host a Winter Press Tour with Krysten Ritter, Andie McDowell, and Leslie Bibb; Forevermark and InStyle take over Bar Nineteen12 at the Beverly Hills Hotel for a party with Michelle Williams, Jessica Alba, and other leading Hollywood ladies—Monday and Tuesday night were bustling with events all over the city, get the details on what went down in this edition of Last Night's Parties. More»

Go HERE for more photos by Aron Campisano and tag yourself and your friends!

It's officially Awards Season, and you know that means L.A.'s the busiest time of year, with more events, red carpets and swag bags than you can fathom. Last night, diamond masters Forevermark and InStyle got a Hollywood head start in the game hosting the "A Promise of Beauty and Brilliance" cocktail party with Golden Globe nominee guest of honor Michelle Williams. Joined by a slew of other leading ladies including Jessica Alba, Busy Philipps, Rebecca Romijn, see who else stepped out for the occasion. More»

Chris Pine, Samantha Ronson, Nicky Hilton and more join hosts Olivia Wilde and Marvin Scott Jarrett at SKYBAR to celebrate NYLON's August Denim Issue; TV industry veterans light up the panels for the audience at Day 1 of the 2011 Television Critics Association Summer Press Tour; Travis Barker, Paul Wall, Louie Vito and more inaugurate Jeremy "Twitch" Stenberg into the Famous Stars & Straps family at a pre-X Games kickoff at The Roxy—it's been a slow week but things are picking up so get all the details from the Wednesday night in this edition of Last Night's Parties. More»

Bill Clinton came out for the opening night of Spider-Man; James Franco hung with Ke$ha for AmFAR; Halle Berry showed support for Michael Bloomberg; ELLE helped Olivier Theyskens show off his line; Oh Land rocked the Top of the Standard; Tommy Hilfiger launched his new eyewear line and more! Last night's parties were looking good! More»