Britney Spears Sings 'I'm Not a Girl, Not Yet a Woman' and Crushes on Steve Carell with Jimmy Fallon on 'Tonight Show'

The singer popped by as a friend from camp on Fallon’s popular “Ew!” segment. Britney Spears stepped into the shoes of a teenage girl on…

Read More Britney Spears Sings 'I'm Not a Girl, Not Yet a Woman' and Crushes on Steve Carell with Jimmy Fallon on 'Tonight Show'