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WATCH: Adorable 5-year-old sister's tearful wish for little brother Published: July 30, 2014

In a video that is sure to go viral, Sadie, 5, is informed that her baby brother won't be a roly-poly bundle of giggles forever. He's going to grow up.

This was apparently the first Sadie had heard about it. Through a fountain of tears, Sadie declares that she doesn't want her brother to grow up. No, sir!

H/T: Yahoo
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