From Gangnam Style to The Harlem Shake, viral movements sweep the Internet frequently. But the current craze takes a fair amount of talent, so most of us won't be able to partake. The Cup Song movement was made popular by Pitch Perfect, a movie that came out in 2012 about a college singing group. It stars Twilight's Anna Kendrick and Bridesmaids' Rebel Wilson. During Kendrick's audition for the singing group, she sits on the floor with a solo cup, clapping and beating rhythmically on it while she sings "When I'm Gone." The song is from 1937 by Mainer’s Mountaineers, but the version Kendrick sang is by Lulu and the Lampshades.
To read the original article: What is the cup song (You're Gonna Miss Me) and how to do it - Business Insider
