SKZ2021

SKZ2021 is Stray Kids' second compilation album (following SKZ2020). None of the tracks feature ex-member Woojin. Of the fourteen tracks, nine were redistributed, four cut out his parts entirely, and “Hoodie Season” remained unchanged since it didn’t feature him to begin with.

The Mixtape tracks, based on songs by their rap unit 3RACHA, had almost all their names changed to reflect the original 3RACHA songs. “Mixtape #1,” “Mixtape #3,” “Mixtape #4,” and “Mixtape #5” became “Placebo,” “For You,” “Broken Compass,” and “Hoodie Season.” “Mixtape #2,” on the other hand, was given the totally new title “Behind The Light.”