The elusive British crooner made a rare appearance at Perry’s “Prismatic” world tour on Wednesday, and the “Dark Horse” singer took a quick Instagram selfie of the two of them.
Katy captioned the pic, “...And on the 2nd LDN show the Queen graced me with her presence.”
Adele, whose son is almost 2 years old, has largely stayed out of the public eye in recent months, but looked gorgeous, wearing a brimmed hat, a textured top, and hoop earrings for the show.
The "Skyfall" singer tweeted after the event, praising Perry. "Katy Perry was supreme tonight!"