Kelly Osbourne: 'I think Lady Gaga is pregnant'

Kelly Osbourne has sparked Lady Gaga baby gossip after suggesting the pop superstar may be covering up a pregnancy.

The outspoken daughter of Ozzy and Sharon Osbourne told British comedian Alan Carr during an appearance on his chat show that she has her suspicions that the Paparazzi singer will soon be announcing some big news.

In the taped interview, which will air in the U.K. on Friday (21Sep12), Osbourne says, "I think she is pregnant because she has been covering up this part of her body recently and I have been noticing that a lot, and her style has changed and you can't bleach your hair blonde when you are pregnant."

However, since Osbourne recorded the Carr chat, Gaga sparked controversy when she lit up what appeared to be a joint onstage at a gig in the Netherlands. Expectant moms are urged to give up smoking and drinking alcohol during pregnancy.

Meanwhile, the singer has addressed speculation about her recent weight gain, phoning in to New York radio station Z-100 to state, "I'm dieting now but my God, I think I gained, like, 25 pounds over Christmas."