On her Instagram last night, Gomez, 22, shared a video from her rehearsal. She says, "More than anything I’m just excited that people everywhere who are feeling what I feel and feel that will get to see that. I just want people to be able to relate to that."
"The Heart Wants What It Wants" is a relatable song in which Gomez sings about her pain from a bad relationship. Although she doesn't mention her on-again, off-again relationship with Justin Bieber, the song is about a guy that has hurt her.
“When I was on stage and I was thinking of ...I felt like I know him though and I know his heart and I know he wouldn't do anything to hurt me,” she says. "But I didn't realize that feeling so confident and feeling so great about myself ...and then it just be completely shattered by one thing."
ETonline will have all the latest from the AMAs airing at 8 p.m. ET/PT on ABC. For now, check out our preview below.