Justin Bieber In CSI Lip Sync Scandal!

Biebs mimed co-star's lines ruining scenes of the show...

Justin Bieber reportedly caused havoc when filming his cameo for CSI after he was caught miming his co-star's lines and ruining their scenes.

The Somebody To Love singer, who stars as troubled teen Jason McCann in the US crime series has reportedly cost the show a small fortune after his scenes needed to be reshot every time he lip-synced his fellow actors words…on camera.

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A source told the National Enquirer: "It's good Justin's got everyone's lines memorised so he knows where he's at in the scene, but the camera keeps catching him lip-synching when the other actors speak. It's hilarious - but damned expensive!"

Justin, who was only meant to feature in the season premiere of the show will now be a regular fixture on the CSI set after bosses decided to make his role permanent through the series.

A spokesperson for the show recently stated: "He will play a troubled teen who is faced with a terrible decision regarding his only brother - a decision that leads him into an explosive confrontation with the CSIs."

They added: "It is the beginning of an emotional story that will conclude later in the season."

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Meanwhile, the pint-sized popstar has asked Will Smith's son Jaden to perform with him on stage as the prestigious Madison Square Gardens in NYC.

Justin, who collaborated with Jaden on track Never Say Never for the Karate Kid soundtrack will sing the song with Smith on August 23rd, according to the New York Post.

An insider claimed: "Special security arrangements are being made for Jaden, who will appear on stage, and his family, including Will, to be in the audience for the concert,"

Bieber's pal Sean Kingston and Jessica Jarrell are also rumoured to be attending the concert.

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