Over the weekend on the West Coast, The Billboard Music Awards took over Las Vegas, with music's biggest stars rocking both the red carpet and the stage. Estelle, Nick Cannon, and Billy Ray Cyrus performed at the official pre- and post-parties, while back in L.A., Rachel Zoe and Molly Sims hosted Ovarian Cancer Research Fund's Super Saturday and more!

The Guest List

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Conan O'Brien• Natasha Bedingfield• carrie underwood• Rachel Zoe• Will Ferrell• Ryan Cabrera• Jennifer Lopez• Jessica Alba• Rachel Roy• Liev Schreiber• Lisa Rinna• Patti Stanger• Nick Cannon• Joe Zee• Molly Sims• Kelly Rowland• Estelle• Las Vegas• Lance Bass• josh groban• Billy Ray Cyrus• Tiffani Thiessen• Jordin Sparks• Patricia Heaton• Armie Hammer• Shakira• Ricky Martin• Rodger Berman• kesha• Brittny Gastineau• Nikki Reed• Giuliana Rancic• Bill Rancic• Fred Durst• Sarah Hyland• Lucy Hale• Aloe Blacc• The Hammer Museum• Jermaine Dupri• Scott Stuber• Ed Begley Jr.• Nicki Minaj• Wiz Khalifa• Charlotte Ross• Billboard Music Awards• Jeanne Tripplehorn• Lisa Gastineau• Miranda Lambert• Nikki Deloach• Iggy Azalea• Brady Smith• Roshon Fegan• Casper Smart• Heather McDonald• Luke Bryan• phillip phillips• Janel Parrish• Charli XCX• Bootsy Collins• Rob Younkers• Becca Tobin• Shania Twain• Florida Georgia Line• Lorde• Benjamin Stockham• 2014 Billboard Music Awards• Billboard Music Awards After Party• Billboard Music Awards Pre-Party• Rachel Zoe & Molly Sims Host Ovarian Cancer Research Fund's Super Saturday LA• Christina Millian• George Kotsiopoulus• Steven R Mc. Queen• Barker Hangar in Santa Monica• The 5th Annual K.A.M.P Event at The Hammer Museum• Glen Davis• Compton Jr. Posse 7th Annual Fundraiser Gala• Hyde Bellagio at Bellagio• The Light at Mandalay Bay• 2014 Billboard Music Awards: Official Pre & Post Parties• MGM Grand Hotel and Casino