Melbourne, Jan 29 : American singer Jessica Simpson's beau Tony Romo, who is a Dallas Cowboys quarterback, has been revealed to have cheated on her while she was away.

According to Star Magazine, as soon as Simpson flew out of Burbank airport on January 16, Romo decided to host a party at her house, where he is said to have hooked up with a brunette in the singer's bed.

Simpson, 28, already has a lot on her plate at the moment, after being sued 10 million dollars for allegedly breaching a contract while filming an exercise video for the Speedfit System, reports the Daily Telegraph.

She has also been very much in the news for her recent weight gain, which has left her younger sister Ashlee and TV socialite Kim Kardashian defending her. (ANI)