Watch: Russell Brand attempted to serenade his dog with a song but the dog was having none of it

It can't do wonders for your self confidence when your best friend gives such a negative review of your vocal talents.

However, we doubt Russell Brand will be too put off by the critical reception of his rendition of the Cheers' theme song. The star shared a video to his Facebook page of himself singing the tune to his dog, Bear who was having none of it. 

Maybe it wasn't Brand's singing that drove Bear to despair but rather that he simply wasn't a fan of Cheers. Either way, Brand will probably think twice before serenading his furry pal again.