Despite mixed reviews, Oscar host Seth MacFarlane felt like performing more after his Sunday night gig. After crooning during the awards, including that instantly infamous “We Saw Your Boobs,” the “Family Guy” creator hosted his own party for 500 at Hollywood’s the Lot, where he performed with a giant orchestra. He sang standards “Luck Be a Lady” and “Fly Me to the Moon,” and spies said Charlize Theron “stayed near MacFarlane all night.” Guests included “Glee” star Matthew Morrison, Joseph Gordon-Levitt, Emile Hirsch, Alyssa Milano and Harry Shum Jr., who danced a few numbers at the Stoli-sponsored bash. Steven Tyler was seen ambling out when the party ended at 4 a.m.