Thirteen-year-old rappers Chris "Daddy Mack" Smith and Chris "Mack Daddy" Kelly became the pop sensations of 1992 as Kris Kross. The two were discovered at an Atlanta mall in 1991 by then-19-year-old producer Jermaine Dupri. Thanks in part to savvy marketing, "Jump," which sampled the Jackson 5's "I Want You Back," became the fastest-selling single in 15 years, staying at number one for eight weeks on the Billboard charts and pushing the sales of their debut album, Totally Krossed Out, past four million. Another gold single followed in "Warm It Up," and Kris Kross toured Europe with Michael Jackson and appeared on innumerable teen-oriented TV shows. The follow up albums Da Bomb and Young Rich & Dangerous, both reached platinum status. The duo recorded over 20 unreleased songs after the third album release. Smith wrote and produced "Best Friends Forever", where he mourns the loss of his childhood friend. On the recording Smith raps, sings and plays all keyboards, bass and guitar parts. non-primary source needed][not in citation given] The song is an interpolation of "That's What Friends Are For", originally written by Burt Bacharach and Carole Bayer Sager, and first recorded in 1982 by Rod Stewart for the soundtrack of the film Night Shift. The song was released via his website urbanemuse.com