2U David Guetta Feat. Justin Bieber
2 January 2014, 08:40
The track is posted online by the 'Bad Romance' star following their performance of the track on The Voice last year.
Lady Gaga and Christina Aguilera received all the plaudits on the final of The Voice in the US last year following a duet of 'Do What U Want'.
Now the pair have released an official full recording of their collaboration online.
The track was posted on Gaga's YouTube account and sees the pair sharing impressive vocals for the 'ARTPOP' track.
The original song features R&B star R. Kelly and an official video for the track has been teased over recent weeks.
Meanwhile, Lady Gaga is preparing to head back out on the road in 2014 after being forced to cancel her tour dates in 2013 to undergo hip surgery.
She is yet to confirm dates for the UK, but the 'Artrave: The ARTPOP Ball' US outing kicks off on 4th May in Fort Lauderdale.