(TMZ)
Justin Bieber really knows how to put on a show.
The cheeky pop star was snapped wearing nothing but his birthday suit and a guitar during a performance for a lucky “fan” – his grandma, according to TMZ .
Nude Biebs was at his granny’s home in Toronto during Canadian Thanksgiving in 2012 when he decided to cover-up with a guitar for his impromptu serenade.
According to the celeb site, Bieber’s lyrics were along the line of “I loooove you grandmaaaa … how are youuu … helloooo grandma.”
She apparently thought the morning prank was funny but eventually begged her famous grandson to go back to his room and put some clothes on.