Amy Adams, who performed "Happy Working Song" from Enchanted during the ceremony, finally takes a break from her crazed Oscars day, heading out of the Governor's Ball. "I was in rehearsals all day from 9 a.m." she tells PEOPLE. The highlight? "When I finished singing! It was such a relief! It's been the only thing on my mind for a while so it's nice that that's behind me now."