The singer wants to put on 15lb of muscle

Justin Bieber, 17, is on a new protein-rich diet to bulk up.

The star hates his puny frame and has asked super-fit pals Zac Efron and Justin Timberlake for tips.

He wants to put on 15lb of muscle by eating egg whites, grilled salmon and chicken.

Selena Gomez, you’re a lucky girl.

Read all the Justin Bieber gossip in Now magazine dated 24 October 2011 – out now!

11140%7C00001a7c0%7C1fe8_wk43-Cover.jpg

NEW PICTURES Justin Bieber‘s life story in photos>>

NEW PICTURES Justin Bieber: Lowdown on the teen star>>

SEE PICTURES Justin Bieber in The top 20 teen idols>

SEE PICTURES Justin Bieber: Never Say Never premieres in London>>