We all have some fond memory of songs from way back when, either because they were the soundtrack to certain events in your life, or because the songs were just plain rockin’. And thanks to the greatness of second-generation (and 2.5?) K-pop idols, the year 2011 was filled with straight-up bops (and plenty of grayscale colored MVs) that we still hear about today. While it’s sad that most of the groups on this list have either disbanded or undergone lineup changes, this only makes these gems from them even more precious.

So scroll down for some memorable hits (in no particular order) from 10 years ago that will still hit you right in the heart:

“Be My Baby” – Wonder Girls