> We cannot attribute any moral judgment to Bieber as a human being; we can only answer the moral question as posed in the song.
As a semi-off-topic little rant, why do we always assume that pop singers are singing about themselves and their own experiences? Can a song, as a work of art, not have an independent existence, much as a novel may? Pop, rap, and maybe country songs are all now assumed to be about the artist themselves.