NBA YoungBoy has been killing shows back-to-back on his 'Make Slime Great Again' tour. He's been moving city to city without missing a beat until his stop in Chicago. After the United Center canceled his scheduled show, fans were left upset and debating online. RELATED: Never Declining? Social Media Pops OFF After Fan Crowns NBA YoungBoy Best-Looking Male Rapper (PHOTO)The United Center Cancels NBA YoungBoy's Chicago ShowOn Monday, the United Center left many NBA YoungBoy fans distraught after canceling his Chicago stop at the last minute.