Steven Tyler has reportedly asked for a pay rise to stay on 'American Idol'.

The Aerosmith frontman still has half of his two-year deal to complete but after fellow judge Jennifer Lopez entered contract negotiations that would see her earn an estimated $20 million-a-year - twice the 'Crazy' hitmaker's current salary - he now wants his wage increased.

A source told the New York post newspaper: "Jennifer's management is close to brokering her a huge deal to come back to the panel for at least one more season, and but the side effect is that it means her fellow judges also want more money.

"Steven is halfway through a two-year deal, and his management has asked for more money. They argue he was just as sensational and as popular on the panel as Jennifer. But, on the other side, show bosses argue he's tied into a deal and has to stick to it. However, it's hoped they can come to a compromise to keep Steven happy, because the producers love him."

While the singer-and-actress - who joined 'American Idol' along with Steven at the start of the last season - is said to have agreed the financial terms of her new contract, negotiations are said to focus on scheduling her appearances on the TV talent contest around her movie commitments.

Her spokesperson said: "Talks are ongoing - she has nothing to announce as yet."

Randy Jackson - the show's only remaining original judge - has already stated his future commitment to the programme.