Pop star Katy Perry has dismissed rumors that she is expecting a baby with her British fiancé Russell Brand.

Rumors had been swirling that the pair – who have only been dating for five months – were about to have a baby after they were spotted checking out baby clothes in a London kids boutique called Cubs.

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But Perry killed the rumors by confessing on her Twitter page that it was her time of the month by saying: “@thedoctoluke ur gonna make me cry, maybe that’s my period tho. THAT’S RIGHT I’M BLEEDING. Face. Better luck next month peepz.”

Speculation the 25-year-old is carrying 34-year-old Brand’s baby also spiked after she posted a series of hints on her Twitter page recently.

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One tweet read: “Just so you guys in LA that you guys are about to experience 2010 … It’s noon on January 1st here in the future – let me tell you 2010 is BUMPIN!”

And Perry also posted a series of cryptic Twitter messages hinting she was pregnant – the day after her New Year’s Eve engagement in India, the singer wrote: “Let me tell you 2010 is BUMPIN!”

Twitter users were stunned to learn that Kim Kardashian is currently garnering $10,000 a tweet from advertisers. Most Twitter users were more amazed than bothered by the fact that Kardashian’s Twitter page contains paid advertisements. Other users were concerned that she didn’t label her sponsored tweets like Perez Hilton and other celebrity endorsers.

Kardashian’s Twitter page is littered with tweets likes this, ”Check out my commercial for @carlsjr…What do you think?” and “OMG!!! Bumpits! I need it! LOL.” Which tweets are paid? At this time, Kardashian’s Twitter page does not have any tweets labeled as sponsored. According to Derek Rey the co-founder of Ad.ly; Kardashian’s sponsored tweets are limited to once per day.