"Good Girls Go Bad" is a song by American pop band Cobra Starship with guest vocals by Leighton Meester. It was the first single released from their third studio album, Hot Mess. The song was released digitally through iTunes on May 11, 2009. On May 8, 2009, "Good Girls Go Bad" made its radio debut on KIIS-FM with Ryan Seacrest's show.

Cobra Starship was an American dance-rock band from New York City, New York, formed in 2005 by Gabe Saporta. He recorded the first album as a solo project, While the City Sleeps, We Rule the Streets. Saporta later enlisted guitarist Ryland Blackinton, bassist Alex Suarez, drummer Nate Novarro, and keytarist Victoria Asher, all of whom provide backing vocals.