It seems the musical genes are running in Justin Bieber's family after he posted a video of himself singing with his sister Jazmyn.

The clip sees Justin sing his track 'Boyfriend' with his little sister whilst on a plane.

She starts singing the lyrics in unison with her brother but ends up seemingly getting a bit of stage fright, turning her head away in shyness.

The Biebers may well have been on the plane leaving London, where he performed on Saturday (June 9) at the Capital FM Summertime Ball.

He was joined by special guest Carly Rae Jepsen on stage during his performance at the massive Wembley Stadium event.

Watch the Bieber's take on 'Boyfriend' below: