Just a day after Katy Perry revealed that Kanye West will guest star on her new single, 'E.T.', as well as appear in the video, the track has been unveiled. 

The version that features on her latest album 'Teenage Dream' doesn't include West, but he has recorded parts for the song which has now been revealed to fans. It kicks off with a verse from the 'Golddigger' star and then launches into Perry's fragmented vocals. 

Perry tweeted earlier today, February 16:

"WHO'S EXCITED TO HEAR THE FRESH, NEW E.T. ?!?! Coming in a couple of days... Keep your EARS PEELED...#E.T.KATY&KANYE"

Check out the revamped version of 'E.T.' below: