Of course. Current youth generation's pop songs are always bad (mostly).
"The children now love luxury; they have bad manners, contempt for authority; they show disrespect for elders and love chatter in place of exercise. Children are now tyrants, not the servants of their households. "
I believe this quote is apocryphal. AFAIK it's actually quoting a play by Aristophanes that poked fun at Socrates -- a play that put these words in his mouth.
It is worth adding that though I agree that songs can be literature, songs also have non-literary elements, which means that songs that are not literature can still be good songs. Here I'm thinking of artists like DJ Shadow or the Beastie Boys, where some other element such as the soundscape or even just the beat carries the music.
I'm not a Bieber fan, but I think it's unfair to judge him strictly by his lyrics. Or Sinatra for that matter.
But then again, remember that Sinatra vs. Bieber meme... http://weknowmemes.com/2012/02/music-what-happened/