Demi Lovato

The 31-year-old singer is allergic to both cats and dogs.

She told Buzzfeed: "I'm not allergic to all animals, just cats and dogs. Sometimes I'll have a bad allergic reaction to dogs, sometimes I won't. But cats, if I am 10 feet away from them, I'll be freaking out. I'll be in the room with someone and have an allergy attack and be like, 'Do you have a cat?' and they'll say, 'Yeah, how'd you know?'"