Justin Bieber is turning 21 tomorrow! And Beliebers around the world are so excited for this milestone birthday that they've been flooding the web all the reasons why the "Never Say Never" singer is so amazing.

Using the hashtag #21ReasonsWhyWeLoveJustin to commemorate him turning 21, Twitter have been overflowing with fans revealing all the reasons why Justin is their favorite pop star. From his boyish looks and sick dance moves to the care and appreciation Justin has for his fans, they say it all. Despite the "21" in the hashtag, Beliebers reveal that the reasons why they love him are infinite and have caused the hashtag to trend on Twitter.

With the strong response from the Belieber camp, we here at PopCrush have compiled some choice tweets showing why people love Justin Bieber. Check out our picks below, and click here to see the ever-growing list on Twitter.

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