What song plays in 17 again when Zac Efron goes to high school?

The song that plays in *17 Again* when Zac Efron goes to high school is "Can't Stop the Feeling!" by Justin Timberlake.

This song is a very catchy and upbeat tune, which perfectly captures the excitement and energy of Mike O'Donnell (Zac Efron) as he re-experiences high school.