While appearing on BBC Radio 1's Live Lounge, Demi Lovato performed a mash-up of Lady Gaga's "Disease" and "Perfect Celebrity."
"I fell in love with the album 'MAYHEM,' and Lady Gaga is so incredible on it that I wanted to do a cover of her here," Lovato said. "I had a lot of fun singing it."
You can also listen to their performance here:
Lovato has given Gaga her flowers numerous times this year, having told Andy Cohen on "Watch What Happens Live" that the MAYHEM Ball was one of the best concerts they have seen.
Late last month, they told Z100 that they'd love to chat and collaborate with Gaga, and further gushed about the MAYHEM Ball.