Christina Aguilera is reportedly to be axed from 'The Voice'.

The 'Beautiful' hitmaker - who stars as a judge on the singing talent show alongside Adam Levine, Cee-Lo Green and Blake Shelton - has already signed up for a second series of the show, but producers are said to be unhappy with her on the show and want to replace her for a potential third cycle.,

A source told "She doesn't spent time with her contestants like she's supposed to.

"She doesn't participate. She spends most of her time on the set with her boyfriend."

Earlier this year NBC Network's Paul Telegdy said he was pleased all of the judges would be returning to the series.

He revealed: "Our fantastic coaches were integral to the tremendous success of 'The Voice' this year and we are thrilled they are all returning."

Christina reportedly earns £140,000 per episode of the show - which requires the panellists to critique singers for their talent alone and not what they look like - while the other judges earn £47,000.

A spokesperson for NBC has denied the claims, saying: "There is absolutely no truth to the rumour."