Riverdale [1] is officially back for season three, and it's more dramatic than ever [2]. While the last few seconds of the premiere left us scratching our heads [3], there is one thing we know for sure: the music this season is already killer. There were some throwbacks to The Beach Boys, but there were also a few modern-day hits like 5 Seconds of Summer's "Youngblood." As you mentally prepare for the rest of the season, grab a milkshake and obsess over the soundtrack ahead.