Taylor Swift

Watch Taylor Swift's duet with Justin Bieber 'Baby'

Watch Taylor Swift's duet with Justin Bieber 'Baby'The 17-year-old pop singer, Justin Bieber made a surprise-cameo at girlfriend's best friend Taylor Swift's concert in Los Angeles, to sing with her his single 'Baby'. The appearance wasn't actually unexpected as Taylor previously covered 'Baby' during her Toronto show.

Bieber tweeted: "Heard you sang BABY at your concert in TO. thank u for the love ...might have to come by and stop in on a show".

During the L.A. show, Bieber tackled the rapping part while Swift sang the chorus. "You think you've heard LOUD screaming in your life. Then @justinbieber comes out and does a surprise song during your show," Swift tweeted after the show. In return, Bieber tweeted, "@taylorswift13 we should do that more often. :) great show! #muchlove" . We would love to see them doing this again!!

Taylor Swift's duet with Justin Bieber 'Baby' :