Katy Perry has announced that she is not expecting a baby with fiancé Russell Brand.

Writing on Twitter yesterday, the singer declared that she could not be pregnant as she had just started her period.

Perry had earlier sparked baby rumours by leaving a series of cryptic messages on the microblogging service which hinted at a possible pregnancy. She had also reportedly been spotted shopping for baby clothes with Brand. However, after one Twitter follower teased her about the reports yesterday, Perry replied: "Ur gonna make me cry, maybe that's my period tho. THAT'S RIGHT I'M BLEEDING. Face. Better luck next month peepz. (sic)"

Perry agreed to marry Brand last month after he proposed to her in India.

Watch a clip of Brand and Perry addressing the pregnancy rumour with MTV below: