Dupri and Da Brat wore their pants backward to pay homage to Kris Kross, who was known for wearing their clothes backward, but won over fans with their infectious rap hooks.
Throughout the nearly two-hour service, numerous photos were shown behind the pulpit of Kelly posing with music legends such as Michael Jackson, Gerald Levert and Patti LaBelle.
Two of the four members of the band Xscape, sisters LaTocha and Tamika Scott also performed.
"He just wanted to smile. That's all he wanted," Tamika Scott said when she arrived. "He was known to be a happy person."
Da Brat tried to speak to reporters when she arrived but stopped when she got choked up and went on into the church.
Kris Kross was introduced to the music world in 1992 by Dupri after he discovered the pair at Greenbriar Mall in southwest Atlanta. Kelly was known as "Mac Daddy" and Smith was known as "Daddy Mac."
"Jump" was the duo's first, and by far most successful song. The hit was off their multiplatinum 1992 debut album "Totally Krossed Out," featured the two trading verses and rapping the refrain, the song's title. The duo had surprising maturity in their rap delivery, though the song was written by Dupri. It would become a No. 1 smash in the United States and globally, and one of the most popular of that year.