Gwen Stefani Goes Bananas Performing ‘Hollaback Girl' on ‘Tonight Show'
Gwen Stefani stepped into a time machine with Jimmy Fallon and the Roots on The Tonight Show to perform her 2005 hit "Hollaback Girl." Using a banana as a microphone, The Voice host sang the foot-stomping track as Fallon and the house band shook tinsel-colored pom poms and performed with a tambourine,