Justin Bieber gives Kelly Osbourne a graffiti lesson

Justin Bieber put his bad boy skills to the test on Wednesday night (08Jan14) by giving reality TV star Kelly Osbourne an impromptu lesson in graffiti art.

The Baby hitmaker, who has found himself in trouble in the past for his graffiti antics, took the Fashion Police presenter on a late night outing to show off his hobby and even taught Osbourne how to handle a spray can.

Both stars later took to their Instagram.com accounts to post pictures of their night's work, with Osbourne captioning one image, "Just had so much fun getting lessons from Justin Bieber on how to spray paint! Needless to say I was s**t all I did was the horns! Justin is a lovely boy and have (sic) turned me into a true Belieber (fan) tonight!"

Bieber's obsession with street art caused trouble during his 2013 Believe world tour when police in Rio de Janeiro, Brazil accused the pop sensation of defacing a hotel, while an Australian mayor demanded the singer return to clean up his mess after spray-painting a wall in the grounds of a Gold Coast hotel.