Mariah Carey just learned of Katy Perry’s Origin space flight

She doesn’t know her. 

Mariah Carey isn’t keeping up with the news around Katy Perry. 

Four months after the “Teenage Dream” singer, 40, went to space on the Blue Origin flight in April, Carey, 56, is apparently just learning about it. 

During an interview on “The Scott Mills Breakfast Show” on BBC’s Radio 2, Mills asked the “We Belong Together” singer if she would also go to space like Perry. 

Carey seemed confused, and replied, “Did she go to space?”

When the host assured her that Perry did indeed do that, Carey repeated, with apparent disbelief and confusion, “Where’d she go?” 

Mills seemed confused and said, “Space?” 

“Into orbit and back? She’s, like, floating?” the “All I Want For Christmas Is You” singer asked.

Carey added, “And this is true? Wow. All right, Katy.”

Carey’s blunt reply about Perry’s space adventure is similar to her famous “I don’t know her” comment.

The hilarious snub has since become a meme, but the quote originated in 2003 when Carey was asked about Jennifer Lopez, who was perceived as her rival, and she replied, “I don’t know her.” 

Perry – who split from fiance Orlando Bloom, 48, in July – went on the all-female flight on April 14. She was joined by Blue Origin founder Jeff Bezos’ then-fiancée, Lauren Sánchez, film producer Kerianne Flynn, CBS host Gayle King, NASA rocket scientist Aisha Bowe, and civil rights activist Amanda Nguyen.

The flight lasted roughly 10 minutes, and although the rocket elevated high enough to qualify as going to “space,” nobody exited the vessel. 

Perry, who shares 4-year-old daughter Daisy with the “Lord of the Rings” actor, brought a daisy with her on the flight as a nod to her daughter. (She and Bloom announced their split in July.)

The high-profile trip drew backlash for being a “vanity project,” even as it described itself as historical for having an all-female crew, and Perry was mocked for a photo of her kissing the ground after landing. 

Olivia Munn called the mission “gluttonous” in April. 

“What are they doing?” the actress, 44, said on “Today With Jenna & Friends.” “I know this probably isn’t the cool thing to say, but there are so many other things that are so important in the world right now.”

“I know this is probably obnoxious,” Munn added, “but like, it’s so much money to go to space, and there’s a lot of people who can’t even afford eggs. What’s the point? Is it historic that you guys are going on a ride? I think it’s a bit gluttonous.”

“Space exploration was to further our knowledge and to help mankind. What are they gonna do up there that has made it better for us down here?”

Olivia Wilde also mocked the Blue Origin flight on her Instagram Story.

“Billion dollars bought some good memes I guess,” she captioned a photo of Perry returning to Earth and kissing the ground.

Emily Ratajkowski, meanwhile, said it was “beyond parody.”

The model blasted the group, “Saying that you care about Mother Earth and it’s about Mother Earth, and you’re going up in a spaceship that is built and paid for by a company that’s singlehandedly destroying the planet.”

Even brands got in jabs at the “I Kissed A Girl” singer, as fast-food giant Wendy’s tweeted “Can we send her back” in response to news that Perry had returned from space.

Perry took to social media later in April to address her critics, who she called “unhinged.” 

“When the ‘online’ world tries to make me a human piñata, I take it with grace and send them love,” she wrote. “Cause I know so many people are hurting in so many ways and the internet is very much so a dumping ground for unhinged and unhealed.”