08/28/2012 17:28

By Jenna Mullins

It's Bieber time!

Justin Bieber will appear on this season of The X Factor as a celebrity mentor, multiple sources confirm to E! News. He's reportedly teaming up with L.A. Reid's team to give advice to contestants after the top 16 acts are chosen.

The "Boyfriend" singer, who was spotted filming in the Hollywood Hills for The X Factor on Monday, tweeted out: long day but great day. @LA_Reid @ScooterBraun just like old times! Thanks

Watch the new X Factor promo featuring Simon and Britney butting heads

Each judge is given a group of four contestants to oversee, and this season a celebrity mentor will be joining them during the judge's house round to help out. Rumors are flying around the Internet that Nick Jonas will join fellow Disney grad Demi Lovato as a mentor, but no official announcement has been made from Fox.