Junior Prom & Jealousy

Prom should be fun, right? Not for Ally. She goes with her boyfriend, Gavin, even though she would rather go with the boy who's grown to become her true love. Austin is at the prom with his girlfriend, Piper, though. When Gavin comes to Ally saying their group wants her to have a sing off with Austin she is reluctant. Will she compete against her best friend or just chicken out?