Chance, West said, addressing the rapper as he took the stage at Chicagos U.S. Cellular Field.
The crowd of nearly 440,000 fans around them erupted with applause.
Im so proud of this young man right here.
Credit: Prince Williams/WireImage; Tim Mosenfelder/Getty Images
2, and a verse from the Schoolboy Q track That Part.
He later performed Ultralight Beam from his latest LP,The Life Of Pablo,alongside Chance.
In numerous videos posted to Twitter, fans can be seen rushing the stage during Wests set.
Watch West and Chance the Rappers full performance below.
