Justin Bieber Breaks Into Song Behind-The-Scenes Of X Factor!

X Factor judges Simon Cowell and Demi Lovato got to hear their category’s contestants on the show on Wednesday and tonight, it’s Britney Spears and L.A. Reid’s turns!

We previously showed you a clip of Justin Bieber, who├óΓé¼Γäóll be guest mentoring alongside L.A. tonight — but now we have some behind-the-scenes footage!

These clips WON’T be featured on the show tonight, so ENJOY them here before you tune in!

Check out the EXCLUSIVE clip (above) of JB singing, Let It Be, and playing piano for L.A.!

Seems like the Biebs had even MORE downtime in between contestants, as he just couldn’t help but break into song himself!

Take a look at Justin spontaneously singing, Catching Feelings, in L.A.├óΓé¼Γäós Beverly Hills backyard… AFTER THE JUMP!!!

Make sure to tune into FOX at 8pm tonight to watch the Biebs guest mentor L.A.’s category, the Over 25s!

Oct 11, 2012 4:50pm PDT

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