Taylor Swift and Zayn Malik surprised fans by releasing a song that they made together for the upcoming 'Fifty Shades of Grey' sequel 'Fifty Shades Darker'. 

'I Don't Wanna Live Forever' made a surprise appearance in the U.S. Itunes store at exactly midnight on Friday, December 9th. The singers were described as "two of pop music's brightest stars teaming up for a very passionate duet."

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The song which is the first song to be released for the 'Fifty Shades Darker' film is a mid-tempo number that features both Malik and Swift singing verses with Malik taking the chorus in his infamous trademark falsetto, the lyrics include the lines "I don't want to live forever, because I don't want to be living in pain, I don't want to fit wherever, I just want to keep calling your name, until you come back home."

26-year-old Swift coyly tweeted a photo about the song with the caption "Z | T | 50", her tweet was retweeted more than 15,000 times in less than an hour. Meanwhile, 23-year-old Zayn decided not to tweet or post about the song on any of his social media accounts.

Fans of the duo were far from being restrained with the #idontwanttoliveforever trending number one on Twitter. 

Zayn Malik who performs under the name 'Zayn' is currently dating one of Taylor's best friends, model Gigi Hadid. While, Taylor previously dates Zayn's former One Direction bandmate, Harry Styles. 

Tagstaylor swift, Zayn Malik, Music, Fifty Shades Darker