Singer Christina Perri has laughed off rumours she is expecting her first child following a mix-up.

The Jar of Hearts star's brother is preparing to welcome a baby with his partner, and the singer has been documenting the countdown to the birth using the hash tag #babyperriwatch.

However, some fans misunderstood her tweets and the confusion sparked rumours Perri herself is expecting, so she took to the social networking website on Wednesday (18Jun14) to set the record straight.

She writes, "To all the people who think I'm about to have a baby with absolutely no baby bump... Lol (laugh out loud)."