A.C.E has a lot of great tracks, but I think my heart is most stuck with 'Under Cover' https://youtu.be/qODWFe6v3zA https://www.youtube.com/watch?v=4ZcbsMKuR4U I love it when kpop incorporates a more rock sound in music. Not necessarily a full on rock (although I like that too), but elements of it. The guitar is so powerful and great! The way their gorgeous vocals contrast with this rough sound is absolute heaven! And that buildup at the end is my everything. The choreo is cool too. 8)