Hollaback at the most energetic and popular female in pop music, Gwen Stefani, as we pay tribute to her defining moments!Includes fun, hip new versions of Stefanis hit singles Hollaback Girl, What Are You Waiting For and Rich Girl plus fan favorites from No Doubt such as Dont Speak, Just A Girl, Rock Steady and more!Stefani was recently rewarded with two Billboard Music Awards, for New Artist Of The Year and Digital Song Of The Year!