Chance the Rapper and Nas performed at the Obama Foundation Summit, which took place in Chicago over the course of two days, on Oct. 31 and Nov. 1.

Approximately 500 participants from 60 countries attended the two day event, which " aims to inspire a new generation of leaders, in Chicago's South Loop," according to ABC7 Chicago. The even culminated yesterday with performances by Chance, Nas and Gloria Estefan, as well as a headlining speech by Michelle Obama. Barak Obama officially closed the summit with a speech.

"You are right there, ready, and able to transform the world," he told the audience.

Lin Manuel-Miranda was also in attendance and spoke to attendees, along with Chicago native Common.

"Once I realized that music does affect lives, and that art affects lives, and our voices mean something, that was when I was like, okay, this is a part of activism," Common said.

Miranda reminded everyone that their voices can affect change.

"If you don't have a dollar to spend, you can get your voice heard and make an enormous difference because, frankly, that's what we have!"

 

Worst to Best: Every Nas Album Ranked