For this week's VIBE Rewind, VIBE takes a look at a performance by 21-year old Chicago native Chance The Rapper, who performed his track "Good Ass Intro" from off of his 2013 mixtape Acid Rap at Lollapalooza in 2012. Chicago's annual musical festival Lollapalooza kicks off today with performances by Eminem, Nas, Childish Gambino, and more.