Justin Bieber and Taylor Swift have teamed up to write a song together.
Teenage pop star Bieber, who has been recording a new album, invited Swift to join him in the studio on Friday (26Aug11) to pen a track together, according to Grammy-winning producer Thaddis 'Kuk' Harrell.
Harrell took to his Twitter.com page to tell followers, "Wow!! Got to see Justin Bieber & Taylor Swift write a song together last night!! SMASH!!!! SMASH!!! SMASH!!! Let's do it again y'all!!!"
He later tweeted Swift, "You and Justin killed that writing last night!!! SMASH!!!!!!!"
The collaboration came just days after Swift and Bieber thrilled fans with a surprise duet during the country star's concert in Los Angeles on 23 August (11).