Justin Bieber needs to take a page from Zac Efron's book on not just how to treat his fans, but how to be a decent human being.

Efron was reminded why he does what he does while taking questions from fans to promote his new movie 'That Awkward Moment.,  His biggest fan, 30 year-old Kirby Koo, stood up and professed her love for the 'High School Musical' star. She even told Efron she had permission from her husband to gush. Efron was so impressed, he came down to hug her and say thank you.

The moment was so moving, Efron posted his appreciation on Facebook.

NEXT: Zac Efron Sings with Taylor Swift

Taylor Swift and Zac Efron Duet on "Ellen" [VIDEO]