Keri Hilson has surely transformed herself since the release of her debut album, “In a Perfect World.” With her sophomore album, “No Boys Allowed,” ready to drop on December 21, Hilson showed off her “Pretty Girl Rock” style, taking us behind the scenes of her album art photo shoot to show off her new look and explain the new release’s title. Watch the video now and see why Keri says the main message in “Pretty Girl” is to “love yourself.”