Today marks the beginning of Chorus Week here at Billboard, where we'll be deep-diving into some of the greatest recent refrains that drive every successful karaoke night, concert encore and office desk hum-along. While most of the great choruses of the 20th century -- from "Be My Baby" to "Livin' on a Prayer" to "I Want It That Way" -- have gotten their decades of due, we felt it was time that to start figuring out the new canon: Which choruses from this century will have the power to get a bar full of strangers singing in unison at the top of their lungs decades from now?
We voted, we debated, and we have our answers: Billboard's list of the 100 greatest choruses of the 21st century, ranked by no metric other than the songs that most immediately came to mind when thinking about everything that a great chorus should be -- clever, catchy, singular, and utterly unforgettable. And perhaps most importantly: When you see the song title, does the chorus immediately jump to mind, not to leave anytime soon? If so, it's the right song for this list. (We considered songs from near the turn of the millennium eligible as long as they peaked on the Hot 100 in the '00s.)
Read on to see our ranking -- skip right to the chorus of each song in our embedded YouTube link, and check out our full Spotify playlist at the bottom -- but make sure your coworkers (or more judgmental friends) are out of earshot first: It's only gonna get harder as we go to resist singing along.