Nick Cannon, Bryan-Michael Cox, Mariah Carey, Jermaine Dupri and Trey Lorenz

If you’re old enough to remember then 1990s and early 2000s then you know that productions of Jermaine Dupri defined that era of Hip-Hop and R&B. So, last evening, as the icon celebrated the 20th anniversary of So So Def, many of the artists with whom he worked throughout the years were happy to participate in the festivities.

However, don’t think for a second that the So So Def anniversary concert was packed with has-beens and acts far passed their primes because the show included major star power. Among the artists who hit the stage were Jay-Z, Mariah Carey, Usher and Monica, all of whom surprised the crowd and even the band with their unexpected appearances.

Watch standout moments from the So So Def anniversary show below:

Jay-Z & Jermaine Dupri – “Money Ain’t A Thing”

Jay-Z – “PSA”

Mariah Carey & Da Brat’s Presentation

Monica – “Love All Over Me”

Usher, Ludacris & Lil Jon – “Yeah!”

Thoughts?