"Good Girls Go Bad" is a song by American pop band Cobra Starship with guest vocals by American singer and actress Leighton Meester. It was the first single released from their third studio album, Hot Mess (2009). The song was released digitally through iTunes on May 12, 2009. On May 8, 2009, Good Girls Go Bad made its radio debut on KIIS-FM with Ryan Seacrest's show.