Fallon as Sara then decided to try out some emoji selfies, or as they called them “Emojelfies!”
The host tried out the crazy face and the singer did the “crying laughing face.”
“Oh my god, we’re so pretty!” Sara shouted.
Concerned they might have to kiss a boy at the dance, the pair practiced making out on “crush pillows” that featured the faces of Ed Sheeran and Mario Lopez. Watch the rest of the clip to see what happens when Sara’s dad walks in!
WATCH: EXCLUSIVE: Demi Lovato Opens Up About Her Sobriety: I Know 'My Life Depends On It'
Lovato isn’t the first pop star to sit on Sara’s couch. Taylor Swift, Miley Cyrus, Ariana Grande and Jennifer Lopez have all put on their best “Ew!” faces.
For more from Lovato, watch the clip below!