May 11, 2015 | 11:53pm ET
Twice a month, Chance the Rapper hosts a closed-door open mic event for high schoolers of Chicago. The latest installment proved extra special, as Chance brought along Dr. Kanye West and Vic Mensa as surprise guests. They performed Kanye’s “All Day” and “We Don’t Care” as well as Mensa’s “U Mad”. Watch a series of fan-shot video clips below.