Sir Paul McCartney is a busy man about town and in case you needed any more proof of that, just know that he's been in the studio with Lady Gaga as recently as this week.
McCartney has gained attention in recent weeks for his collaborations with Kanye West and Rihanna. Some reports even suggested that McCartney executive produced Kanye's latest record--a claim Kanye West denies.
Now, fans will surely be left scratching their heads even harder at news of his newest collaboration.
In her Instagram post, Gaga made reference to Paul McCartney’s "secret projects" and revealed that the first time the former Beatle called her to work together she hung up, thinking it was a prank.
Aye, yo Gaga. Tell us more about these "secret projects". We're interested.