Demi Lovato's
a believer! 

The "Skyscrapers" singer sat down with Seth Meyers on "Late Night" where the two discussed her fascination with aliens and mermaids ... telling Seth that she's positive they exist. 

Check out the video above to find out why Demi thinks they are real!

Lovato starts off the discussion admitting that she loves a good conspiracy theory and then gets into a passionate debate about aliens, the underwater world of Atlantis and mermaids.  

"How self-centered would we be as humans to believe that we are the only living things in the universe," she said. 

While  Meyers is not a believer, he did have some fun with the interview and and cracked a few jokes at Demi's expense. 

So what's the 21-year-old's proof? A "really convincing documentary that came out," she says about the sea creatures. "The Little Mermaid?," asked Meyers. 

Seth also asked Demi to come back when she's done her research on the moon landing being faked. 

The two definitely have a great rapport! What do you think of the singer's comments? Tell toofab in the section below! 

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