Pop music's hottest  artists including Carly Rae Jepsen, Taylor Swift, Nicki Minaj and Justin Bieber hit the 2012 American Music Awards; Skrillex and Skylar Grey celebrate the AMAs with Interscope; The Wanted performs for Joanna Krupa, Kendra Wilkinson and others at Us Weekly's Music Party; Nikki Reed, Brad Goreski, Jenny McCarthy and many more hit Rolling Stone's AMA after party; Joel McHale, Seth Green and numerous other comedians help Variety honor Seth MacFarlane—get the details on who turned up where during this very busy weekend in L.A. in this edition of Last Night's Parties.

Seth Green Avalon Chris Brown Kerry Washington Heidi Klum Taryn Manning 50 Cent carrie underwood Will.I.Am Bill Maher MC Hammer Ginnifer Goodwin Cyndi Lauper Taylor Swift Ashley Tisdale Christina Aguilera Patti Stanger Kelly Rowland Maria Menounos Ludacris Aisha Tyler Hayden Panettiere Kelly Clarkson Jenny McCarthy Lance Bass Stevie Wonder Gwen Stefani Gavin DeGraw Pink Emmanuelle Chriqui Jordin Sparks Stacy Keibler Ryan Seacrest Derek Hough American Music Awards Jason Derulo Justin Bieber Ke$ha Usher Giovanni Ribisi Kendra Wilkinson shaun white Joanna Krupa Brad Goreski Jerry Ferrara swizz beatz Ryan Eggold Nikki Reed Marisa Lauren Joel McHale Drake Nokia Theatre Mark Salling Louise Roe Lucy Hale Clare Grant Eric Stonestreet The Redbury Brandy Amanda Warner Pitbull Seth Macfarlane Adrianna Costa Noreen Fraser Foundation Vincent De Paul Jennifer Morrison Rolling Stone AMA After Party Rolling Stone Restaurant & Lounge Nicki Minaj Adrienne Maloof Chord Overstreet Kate Micucci Charlotte Ross Anthony Jeselnik Colbie Caillat Nick Kroll Lauren C. Mayhew Howie Dorough Nick carter Max Greenfield Paul McDonald Kaylee DeFer Jessica Hall Carey Hart Patton Oswalt Kimberly Cole Amy Heidemann Elisha Cuthbert Mark Ballas Amy Schumer Paul Scheer AMAs Eric Andre Pia Toscano Renee Bargh Sheila Shah The Wanted Luke Bryan Lure Hollywood