Britney Spears confuses some with Instagram pregnancy news

Britney Spears has announced her first pregnancy with fiancé Sam Asghari.

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The 40-year-old pop star announced on Instagram on Monday.

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Spears wrote in her post that shortly after a trip to Maui with her fiancé, Sam Asghari,

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she started to gain weight.

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She wrote, "So I got a pregnancy test

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... and uhhhhh well ... I am having a baby."

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Spears is already a mom to two boys

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She finished her post on a positive note saying, "This time I will be doing yoga every day !!!

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Spreading lots of joy and love !!!"

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