Demi talked about her role on Glee, where she'll play Naya Rivera's character's love interest for six episodes.
Sitting beside Neil Patrick Harris, Demi shared that her sister used to have a crush on him--he was her sister's first love!
Neil joked, "I'm so sorry I'm gay."
Demi also talked about celebrating her 21st birthday in Africa to help build a medical clinic. She called it "an incredible experience" and shared a pic of the goat she got as a present.
She also spoke about her new album, her upcoming book, "Staying Strong," and her spirituality.
She even explained that she can read minds, saying Jay was thinking, "Wow, you are my favorite judge on the X Factor. You're so much cooler than Simon."
As for Neil? Demi said he was thinking: "God, I love your sister." Lol.
Demi also talked about her house in Texas being haunted, saying, "there's been some weird stuff that's happened"--check out some of the freaky things that have gone on.
Demi will be back on the Tonight Show October 2 to sing. Can't wait!
Gallery | Demi Lovato's On The Road Instagram