Taylor Swift has once again tested the vocal cords of her fans by bringing a special guest onto the stage with her.
On Tuesday, Taylor nearly made tweendome spontaneously combust when she brought Justin Bieber on stage to sing a duet of Baby with her in Los Angeles.
Last night, she did it again but this time invited Jason Mraz up with her to sing his hit I'm Yours.
Have to say I enjoy this Jason Mraz fella a little more than the Biebs.
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