Nick Cannon has defended his wife Mariah Carey, who is ridiculed in a new song by Eminem.

In the track, entitled 'Bagpipes From Baghdad', Eminem raps that he wants to have another “crack” at the singer.

The rapper, who has previously claimed to have dated Carey in 2001, adds: "Nick Cannon better back...up. I'm not playing, I want her back, you punk'."

According to Access Hollywood, Cannon said on his blog that he felt sorry for Eminem because “he must really be stuck in the past”.

“Not only has his music not evolved, but also homeboy is still obsessed with my wife, the same female that wouldn't let him get to second base from eight years ago,” Cannon wrote.

"What type of grown...man lies about getting with a chick? Only Slim Lamey! LOL!"

'Bagpipes From Baghdad'  is taken from the rapper's forthcoming album 'Relapse'.