OMG! Rob Kardashian's childhood crush is Kim Kardashian

Rob Kardashian and Kim Kardashian 

In a new promo video for Rob & Chyna, the dad-to-be and his fiancée Blac Chyna are quizzed about each others' childhood crushes.

"Her childhood crush was Ricky Martin," Rob reveals in the clip with a laugh. "Yeah," Chyna confirms before

doing a little song and dance to Martin's hit song. "Living La Vida Loca!"

 As for Rob's? "J.Lo!" Chyna yells out.

"That's pretty accurate," Rob confirms.

"J.Lo and Kim Kardashian," Chyna adds.

"That is also pretty accurate," Rob says with a straight face before Chyna adds, "These are facts." OMG!