Taylor Swift may have swept the 2013 Billboard Music Awards with eight trophies and eight corresponding expressions of shock, but it was her backstage reaction to the sight of Justin Bieber and Selena Gomez kissing that won the night.

Swift's shade was the least of Bieber's Billboard woes, though: The man-boy was bombarded by boos from audience members during his acceptance of the Milestone Award for making it through four whole years in the music biz.

The strongly negative reaction forced the Biebz to stop and beg to be "taken seriously" because he is "not a gimmick" but "an artist."

Watch:

[Gif via Reddit]