Joe Jonas has surprised his The Next co-stars with how famous he is.

The Jonas Brothers singer will star with Nelly, Gloria Estefan and country star John Rich in the reality TV show which will see them mentor rising stars of the music scene and Nelly admitted he had no idea how famous the Jonas Brothers were. "Joe Jonas, obviously I didn't know what I was embarking on with this kid here. He got little girls staying out two or three days in advance trying to get tickets to the show for this dude," Nelly told MTV News.

Nelly also revealed he is thrilled to be working with Gloria Estefan because he had no idea she would be so "cool." He added, "The thing about Gloria is she's cool, yo. I didn't know that she would really be that cool considering - not considering anything, you never wanna assume, but you just never know because you're hanging with people now on a daily basis and attitudes show eventually, but there hasn't been any."