Paul McCartney working with another MASSIVE artist!
It looks like Paul McCartney is working with another of the world's biggest stars!
After recently releasing 'Four Five Seconds' with Rihanna and Kanye West it looks like he is set to release single with Lady Gaga!
Gaga confirmed on her Instagram page that she has been in the studio with Macca which is "one of his many secret projects".
She captioned the photo "Always a good time with my buddy. I'll never forget when he called me last year to work and I hung up the phone cuz I thought it was a prank!"
Check out the snap of the pair below!