High Quality Content by WIKIPEDIA articles! "Waking Up in Vegas" is a song by American recording artist Katy Perry, taken as the fourth and final single off her second studio album, One of the Boys. It was written by Katy Perry, Desmond Child and Andreas Carlsson. It is produced by Greg Wells and co-produced by Perry. Wells is credited with playing all the instruments on the song. It was officially released to US radio stations on April 21, 2009 (2009-04-21).