While Selena Gomez has been busy dishing all about her Hollywood crushes – Justin Bieber has proved she’s not the only ‘Baby’ in his life!

The pop pin-up stunned thousands of tweens when he gate-crashed Taylor Swift’s gig in Los Angeles this week for a super special duet.

In a video clip uploaded to YouTube, the packed-out crowd at the Staples Centre are seen going totally nuts as the pair belt out JB’s smash hit single ‘Baby’ together!

Buzzing after her set, which also saw the country songbird perform Gwen Stefani, Beach Boys and Jason Mraz covers, as well as all her favourite hits, she told fans on Twitter,

"You think you've heard LOUD screaming in your life... Then @justinbieber comes out and does a surprise song during your show. Woah. Unreal. (sic)"

And it looks like she’ll have to get used to the screaming because Biebs is up for an encore!

Messaging the ‘Love Story’ hitmaker on Twitter, he wrote,

"@taylorswift13 we should do that more often. :) great show! #muchlove."

See why we’re stoked for T-Swizzle to hit our shores next year in the video clip below…

MTV Exclusive video

Copyright : MTV Australia