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.

Kanye, Chance The Rapper & Vic Mensa performing 'We Don't Care' during @OpenMikeChicago today pic.twitter.com/TkiAkZgJUA — illroots 4 the kids (@illroots) May 12, 2015

Kanye & @VicMensa performing ALL DAY at #OpenMike in Chicago earlier today pic.twitter.com/eCWyJdrImA — Kanye West News (@kanyewestnews) May 12, 2015

Kanye and @VicMensa performing "U Mad" during Chance The Rapper's Open Mike in Chicago today pic.twitter.com/zooPuxhsmv — Team Kanye Daily (@TeamKanyeDaily) May 12, 2015