Happy Mother's Day! Justin Bieber, Usher, Chris Evans, and More Ho**r Their Moms
 

Happy Mother's Day! Justin Bieber, Usher, Chris Evans, and More Ho**r Their Moms
In ho**r of Mother's Day on Sunday, May 10, dozens of stars including Justin Bieber, Usher, and Chris Evans posted on social media about their moms -- see the sweet messages!This article originally appeared on Usmagazine.com: Happy Mother's Day! Justin Bieber, Usher, Chris Evans, and More Ho**r Their Moms