Justin Bieber smokes and drinks booze during show

Justin Bieber was drunk during his surprise appearance with hip-hip duo Rae Sremmurd in New Zealand on Thursday night (01Oct15).

At the start of this year (15), the Baby singer vowed to clean up his act after he became more famous for his legal troubles and run-ins with the police over the past few years.

However, he reverted to his bad boy behavior when he appeared with the rappers at The Studio in Auckland. Video footage shows Bieber dancing aimlessly around on the stage and smoking as the No Type singers perform their hits.

Further clips show Bieber sipping from an expensive bottle of Hennessy cognac, pouring some of it on the stage and tipping more over audience members, before he dances with Rae Sremmurd for their song Unlock the Swag.

The pop star confessed on Instagram.com that he had drunk too much, and shared a video of the concert, adding, "I ain't got no type #drunkjustin."

Bieber also performed his new single What Do You Mean?.