Jennifer Aniston has a secret penchant for singing, according to her boyfriend John Mayer.

John insists the Marley & Me actress has a glorious singing voice and could really “kill” a track if she decided to record.

“Do you know that girl can sing? She does it when she doesn’t think anybody’s paying attention. I said to her the other night, ‘There’s a track in there’. I think she could… kill it.”