Justin Bieber, Katy Perry, Demi Lovato & More Celebrate Twitter's 10th Birthday

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Justin Bieber performs onstage at KeyArena during opening night of the 'Purpose World Tour' on March 9, 2016 in Seattle.

Twitter celebrated its 10th birthday on Monday (March 21) and a slew of celebrities gave best wishes on the social media platform. 

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Katy Perry, Demi Lovato, Fifth Harmony and more from the music world wished Twitter a happy decade with more to come, while Justin Bieber even went so far as to sing "Happy Birthday." 

Twitter Turns 10: Celebrate By Checking Out the First Tweets From Gaga, Bieber, Drake & More

There was reminiscing over first posts, appreciation over how Twitter has changed our world and even helpful suggestions, with Perry asking for an edit feature. 

Check them out here: