Justin Bieber, Jaden Smith 'have dance-off'

Justin Bieber and Karate Kid star Jaden Smith reportedly had a dance-off during a recent trip to a bowling alley.

According to TMZ, the pair were together at the Lucky Strike Lanes & Lounge in New York City on Tuesday night when they decided to embark on a dancing competition.

The two performers - who collaborated on 'Never Say Never' earlier this year - reportedly danced to 'You Make The Rain Fall' by Kevin Rudolf.

Bieber and Smith had arrived at the bowling alley from Madison Square Garden, where Smith made a guest appearance during Bieber's concert, which also featured performances from Miley Cyrus, Usher and Boyz II Men.

Bieber later thanked the "incredible" line-up of performers in a message on his Twitter account, and promised to "share" the night and "all the behind-the-scenes stories of this journey" with his fans in his upcoming 3D biopic.