Justin Bieber is wise enough to know when a gift needs givin’ … but he didn’t have a box — so he covered his junk with a guitar and jammed out a naked serenade for one lucky lady fan — HIS GRANDMA!
TMZ has obtained photos of a completely nude Biebs strumming away on his big wooden instrument … at his grandmother’s home in Toronto during Canadian Thanksgiving back in October 2012.
And why, you ask, did Bieber go ass naked for g-ma?
Our sources tell us JB had been staying at his granny”s house during the holiday … and slept in a little too late on Thanksgiving morning.
Bieber finally woke up after hearing family and friends stirring around the house — so he thought he’d prank ’em … by grabbing his guitar and playing a naked set a la Jenny from “Forrest Gump” (‘memba that?).
We’re told birthday-suited Bieber went right up to his grandma and started belting out some impromptu lyrics … like, “I Loooove you grandmaaaa … how are youuuu … helloooo grandma.”
We’re told G thought it was pretty funny — and everyone in the home was cracking up — but granny begged the pop star to get back in his room to put some damn clothes on, stat.
Canadian Thanksgiving — they go balls out up there.
TMZ