Accoding to Daily Mail
""If she wanted to fuel more rumours of a fake pregnancy then Beyoncé certainly did so last night.
The singer performed her latest single, Countdown, on the Late Night With Jimmy Fallon but her baby bump was nowhere in sight.
Viewers had to do a double-take as the presenter introduced the singer as she wore a short black dress and certainly didn't look six months pregnant.
But fans can relax as the 30-year-old singer hasn't been living a lie - she just pre-recorded the performance back in the summer.
But what baffled audiences more was the fact that Fallon made out that the U.S. star was actually there in the studio.
As he clutched a copy of the singer's latest album, he looked into the camera and said: 'Tonight she's here to perform the song Countdown from her latest album, Four. Please welcome Beyoncé.'The audience surrounded him then erupted into cheers and began to applaud someone who wasn't even there.
It is unknown why Beyoncé chose to pre-record the performance so far in advance - perhaps it was because she didn't want to be on the show this far into her pregnancy.
But it certainly started the rumour mill going again as the public took to Twitter feeling slightly confused and calling it The Case Of The Disappearing Bump.
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