She only sings one song in Lennon, betty. And it's not even a belt-your-brains out song like she should have. Well, that's all she sings along, but you'll get to see some brain-shattering belts every now and then.
Dude. She can sing whatever she wants. The phone book backwards in Pig Latin, I don't freaking care.
A work of art is an invitation to love.