They were her special guests at the Staples Center last night.
Plus: Bruce Willis's favorite Bruce Willis movie one-liner.
Ansari plays himself. Watts plays a vegan female who's considering eating cheese.
She sang "As Tears Go By" with the Rolling Stones.
On his upcoming album.
Plus: Kristen Schaal's wedding involved trained llamas, and more, on our daily late-night roundup.
Gilbert and Sullivan? Ke$ha?!
Why doesn't the Disney Channel have a Disney songs show?
Watch a Sneak Peek of Duets, Featuring a Four-Way Performance by John Legend, Kelly Clarkson, Jennifer Nettles, and Robin Thicke
Puts Huey Lewis and Gwyneth Paltrow to shame, doesn't it?
On Barbra Streisand and Donna Summer: "I know when Barbaa sings, it’s like rose petals."
Plus: Rainn Wilson enacted a conversation between the two "friendliest" cultures, Texan and Canadian, and more, on our daily late-night roundup.
On a cover of "You're So Vain."
He likes a duet.
And so do Lionel Richie and Robin Thicke, in a show that will have them dueting with amateurs.
They're already dueting.
Wait till your mom sees this.
"The Boy Is Mine" gets a followup, fourteen years later. Fourteen!
Predictably, it is great!
"I Want a Hippopotamus for Christmas." Kidding!
It almost makes sense.
Weird for obvious age reasons, but nice.
The video for their first single, "Relator," was released today.