We don't know how to put this, but they're both kind of a big deal.
Mariah Carey got a special visit from none other than funnyman Will Ferrell Friday at her Las Vegas show, Mariah #1 to Infinity, at Caesar's Palace. The pop queen posted on her Instagram page photos of the two and a group shot showing them with several members of her crew and the actor's wife, Viveca Paulin.
"Shake and bake!! Thank you for coming to my show last night!! #elf forever!!" Carey wrote, alongside a photo of her standing with Ferrell.
The singer sported a strapless, gold, glittering gown, while the actor looked sharp in a black tux.
She also shared a pic of herself wiping Ferrell's face with a tissue.
"MC #beautyschooldropout gives #willferrell a touch up," she wrote.
Carey began her Las Vegas concert residency last May. On Valentine's Day, she was joined at her show by her fiancé, Australian billionaire James Packer, and her 4-year-old twins, Moroccan and Monroe, who brought their mother red roses onstage.
"It was such a beautiful gesture," a source told E! News.
Carey and Packer also celebrated with his best friend from Australia, fellow billionaire Kerry Stokes.
"It was a very special weekend for all of them," the source said. "Mariah was beaming and she loved hanging out with Kerry. He's a great man and has been a mentor to James so it was so nice for all them to be together. Mariah was absolutely thrilled to be able to host Kerry."
Carey is set to perform another concert at Caesar's Palace Saturday and then put of her Las Vegas residency on hold to go on tour. She will return to the city for more shows in June.