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Why Haven't You Wished Perrie Edwards Happy Birthday Yet?

It's a thing, ya know?

Most of us are lucky if a couple friends send some generic "Happy Birthday" messages on our big day. Then again, most of us aren't Little Mix's Perrie Edwards. You see, the singer and Zayn Malik fiancee turned 21 today and in addition to her Mix mates it seems like everyone wants to wish her a happy one. That might explain the worldwide #HappyBirthdayPerrie trend.

Here are 21 of our favorite: