Walden and Zoey are having a try-out, before they start living together permanently. When Zoey runs off to pick up some groceries, Walden has to play with her daughter Ava. The song you're hearing is 'Girls Just Wanna Have Fun', by Cyndi Lauper. Season 9, episode 21 (Mr. Hose Says Yes). I do not own the rights of the content in this video.