We're not the only ones who are shocked and saddened by the sudden passing of Kris Kross rapper Chris Kelly.

Chris died at the age of 34 on May 1 after he was found unresponsive in his Atlanta home. More details will be known as to the cause of death following an autopsy later this morning.

Kris Kross were known for making you "wiggle and shake your rump," to quote their early '90s hit "Jump."

Many of our favorite celebrities have now taken to Twitter to express their remorse.

Here are a few of their messages, including tweets from American Idol judge Nicki Minaj; rapper-actor Diddy; and an early '90s rap star himself, the one and only MC Hammer.

Nicki Minaj

LL Cool J

Diddy

MC Hammer

Big Boi of Outkast

Keshia Knight Pulliam