I loved Gwen Stefani as the frontwoman of No Doubt, but her solo stuff is one of my guilty pleasures to listen to when I'm cleaning. Yes, I sing along at the top of my lungs, LOL!

Gwen appeared on 'The Voice' last night to perform "Hollaback Girl" with Pharrell Williams. What I didn't know was that the song was written by Stefani, Pharrell and Chad Hugo as a response to Courtney Love's statement that Stefani was a "cheerleader" in an interview with Seventeen magazine.