Kris Kross was a
 group formed in the early 1990s, consisting of James Christopher "Mac 
Daddy" or "Miggida Miggida Mac" Kelly (August 11, 1978 – May 1, 2013) 
and Christopher "Daddy Mac" Smith (born January 10, 1979). The duo hit 
worldwide status with the smash 1992 "Jump", which was No. 1 on the 
Billboard Hot 100 for eight weeks and certified double platinum as a 
single. The duo followed up with many more platinum, gold singles and 
albums such as "Warm It Up", "Tonight's tha Night" and "Young, Rich 
& Dangerous". The members of Kris Kross were also noted for their 
fashion style, which consisted of wearing their clothing backwards. 
James Christopher Kelly and Christopher Smith's friendship began in 
first grade. The duo was discovered at an Atlanta shopping mall in 1991...
"Jump" is the hit debut single by American hip hop duo Kris Kross. It was released on February 6, 1992, as a single from their debut studio album 
Totally Krossed Out.
 It achieved international success, topping charts in Switzerland, 
Australia, and the United States. Additionally, it was the third 
best-selling song in the US in 1992 with sales of 2,079,000 physical 
copies that year...
Wikipedia credits.