Punk rock singer Pink is swatting down reports that she and husband Carey Hart are having a baby. If she was having one, she said it would be a “600 pound baby.”

The athletic “So What” songstress, real name Alecia Moore, became the subject of baby talk after she was photographed with what appeared to be a belly bump earlier this week.

While the singer didn’t exactly deny the claims — she refused to confirm or deny them — she suggested Thursday (Apr. 15) that the renewed baby speculation is just the latest in a longrunning joke.

“Off to the gym. Lord knows when this 600 pound baby comes out that I’ve been growing for 8 years, i better be strong and physically prepared!!!” she Tweeted about the rumor.

Pink reunited with motocross racer Hart last year after a year apart. Pink met professional motocross racer Hart at the 2001 X Games in Philadelphia. They married in 2006.

Last May, Pink released a four-CD set of her albums Can’t Take Me Home. Missundaztood, Try This, and I’m Not Dead. Her latest album Funhouse was released in 2008.