JUSTIN Bieber has apologised for smoking cannabis.

The teen idol used a comedy sketch on US show Saturday Night Live to admit his drug shame.

Playing the president of his pal Miley Cyrus's fan club, Bieber called himself a "douche".

He said: "I heard he got busted for smoking weed and he's really sorry."

"People make mistakes and he's never gonna do it again."

Bieber, 18, was snapped with the cannabis at a party after splitting with Selena Gomez.

He wrote on Twitter: "Every day growing and learning, trying to be better. I never want to let any of you down."

Read more: http://www.thesun.co.uk/sol/homepage/showbiz/4789129/Justin-Bieber-apologises-for-smoking-cannabus-on-Saturday-Night-Live.html#ixzz2KaJUgNCr (external link)