Simon Cowell raised $1 million for charity by singing.

The 'X Factor' USA judge agreed to put his dignity on the line for a good cause after billionaire 'Power Rangers' creator, Haim Saban, offered to make the huge donation if Simon sang the show's theme tune with him.

The 54-year-old British star, whose girlfriend Lauren Silverman is expecting a baby boy in February, delighted the packed room of guests after he accepted the challenge to raise money for Friends of Israel Defence Forces in Beverly Hills on Tuesday night (22.10.13).

Midway through his performance, Simon offered to donate $100,000 of his own money if he was allowed to stop.

Saban then agreed he could stop singing for $250,000, according to video footage obtained by gossip website

The music mogul was also recently persuaded to show off his vocal talents by his fellow talent show judge Kelly Rowland during auditions for the 'X Factor' in Denver, Colorado, after being urged to show off his skills after he was less than impressed with one wannabe's attempt at singing 1940s classic 'Fools Rush In'.

Simon, who had previously vowed to never sing in public, obliged and was praised by judges Paulina Rubio and Demi Lovato, who said his rendition was ''charming''.

Kelly added: ''I knew that voice was always there.''