No Doubt rocked their first performance together in five years as the band closed the Bamboozle Festival Sunday evening. Gwen Stefani (pictured) looked more like the spunky 90′s front-girl than the high-fashion pop star of recent years. The gorgeous Stefani jumped and skanked around stage as the band played many of its classic songs. She never lost energy right through the band’s most famous single “Just a Girl” and into the unveilment of a new cover the band will be performing on an upcoming episode of Gossip Girl. Maybe the band’s energy will fuel the first studio album since 2001′s “Rock Steady”.