Katy Perry recently showed up on The Ellen Show to film a cute segment called "Will You Perry Me?" and awkwardness ensued when Ellen completely forgot her guest had been married before. (BTW, in case you have Ellen's memory, Katy married Russell Brand in 2010. It didn't end well.)
Their conversation is worth watching in full, but here are the highlights, in GIF form (what else?!):
Katy: "His name was Russell Brand."
Ellen: "Oh, that's right, I forgot about Russell."
Katy: "Remember, you gave me some wedding gifts on this show?"
Ellen: "Yes, I do."
Katy: "Cool cool cool cool cool."