Lady Gaga Joins Beatles Legend Paul McCartney In Studio [PHOTOS]

After his work with Kanye West and Rihanna -- including the just released "FourFiveSeconds" video It doesn't look like Paul's getting any rest. His modern pop projects are continuing at full speed ahead. According to Lady Gaga's Instagram it sounds like they have known each other for quite some time. Long enough for her to hang up on him when he called. LOL.

Lady Gaga looks very excited to be working with Paul McCartney on a secret project, and if you look closely you will also see Pearl Jam guitarist Mike McCready. What on earth is up their sleeve?

A photo posted by @ladygaga on Feb 3, 2015 at 5:57pm PST

"Always a good time with my buddy," she wrote. "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!" Can you even imagine that? She went on to write "Working on one of his many secret projects! Killer musicians, vibe, and lots of laughs."

A photo posted by @ladygaga on Feb 3, 2015 at 6:00pm PST

I guess our younger generation won't be confused about who Paul McCartney is this time. I think Lady Gaga loves working with the seasoned professional. Remember Tony Bennett? Wonder if this project will turn out any awards. With "Cheek to Cheek" Bennett extended his record of the oldest person to achieve a number-one album on Billboard. Is Paul next?