It's been confirmed by Amber Riley of Glee (who plays Mercedes), that Justin Bieber will have a couple of his songs featured on Glee. She spilled the dirt on the red carpet at LA's Golden Globe Awards, stating "There's gonna be two Bieber songs, and I think 'Baby' is one. I think that's correct." But she wasn't 100% sure on the second song that will be featuring, but it could be 'Somebody to Love.'
The Bieber fever will be provided from Sam (the new hot guy) in episode 13. After the brilliant Britney Spears debute in the last episode, we're secretly quite excited to see how well the new hot guy sings a bit of Bieber! (Hes already got the hair cut sorted anyway!)