John Mayer told his fans he wanted to get one of them pregnant at a concert on Monday (11.01.10).

The 'Gravity' singer told the screaming audience at the Q The Music Club show, held at London's Hard Rock Cafe, he planned to impregnate someone straight after the show.

He said: "I'm getting someone pregnant tonight."

The 32-year-old musician went on to suggest he would never have a "hard time" convincing his fans to sleep with him.

He continued: "I'm going to do a cover by another artist who has a hard time making it happen in the UK. I'm not saying I have a hard time making it happen - I could make it happen with any of you ladies tonight. Someone's getting preggers. Someone's going to have my baby tonight.

"It only takes nine months and eight hours from now. We should f**k on a Leap year or on Easter Island."

John has dated a string of famous women, including Jennifer Aniston, Jessica Simpson and Jennifer Love Hewitt.

During Monday's concert the American musician also admitted he had recently learned how to make a "pot brownie" - a chocolate cake laced with marijuana.

He said: "I learned how to make a pot brownie. I went on Google. But then I realised the people who put up the recipes are stoners and they were writing a lot about the planet before they actually gave out the recipe. I made them and fell asleep. They should put them in a bottle and manufacture them instead of sleeping pills."