Jay Z, Usher, Ludacris and Mariah Carey all took the stage at a special concert to mark the 20th anniversary of Jermaine Dupri's So So Def Recordings on Saturday night (23Feb13).

The producer's most famous collaborators and label artists performed at the Fox Theater in Atlanta, Georgia, with Jay Z giving a rendition of Money Ain't a Thang with man of the hour Dupri.

Usher and Ludacris performed their huge hit Yeah! with Lil Jon, and the R&B singer praised Dupri for all his help throughout his chart career, telling the crowd, "I've made more hits with this man than anyone else."

Nineties hip-hop duo Kris Kross reunited for the tribute show to rap their iconic single Jump, while Monica, Nelly and Bow Wow also performed.

Carey then made an appearance, wheeling out a huge cake to mark the special occasion and announcing, "Congratulations to my friend, Jd!"

Dupri told the audience, "Wow... this is crazy. We did it! Thank you everyone - the fans, the artists... ain't nobody f**king with my clique!"