The NBC upfronts were packed with TV's hottest celebs in NYC yesterday. Christina Aguilera, Tina Fey, Joel McHale, and more were on hand for the event, which announces the network's small-screen schedules for the Fall season. Christina was there, along with Carson Daly, to promote The Voice, and she sat down on The Today Show this morning to talk about what attracted her to the judging job. Jenna Dewan was on hand for The Playboy Club, which also stars Eddie Cibrian, and she hung out with his wife, LeAnn Rimes, before the big press day. Pregnant Tina celebrated the renewal of 30 Rock, as did Parks and Recreation's Amy Poehler and Aziz Ansari. Amanda Peet talked up her new comedy with David Walton and Jeffrey Tambor, Bent, and shared that she will most likely bring her two daughters to the set when filming recommences. Christina Applegate stepped out following the January birth of her first child to chat about Up All Night with Maya Rudolph and Amy's husband, Will Arnett. Dax Shepard, Erika Christensen, and Lauren Graham represented Parenthood, and Nick Lachey made the quick trip to the Big Apple for The Sing-Off before heading back to LA.