Christopher Wallace, better known by his stage name Biggie Smalls, appeared in the episode "Hell on Earth 2006", as a resident of Hell. He can be summoned by looking in the mirror and repeating his name three times.
When Butters Stotch summoned him out of curiosity, he was infuriated because he couldn't attend Satan's party in Los Angeles. He forced Butters to take him to the party at gunpoint. While on a plane to Satan's party with Butters, however, he was delay to the party again when the boys summoned him. The boys take him to the airport to resume his flight to the party but only to be suddenly summoned by Stan Marsh's father Randy. He chased Randy around his home until Butters (now outside the party) borrows a mirror and summons him. Biggie was so thankful that Butters had summoned him there that he invites Butters to the party. Butters obliges Biggie's invitation, saying "oh, what the heck I'm gonna get grounded anyway, might as well."
References
Template:Minor characters Season Ten