Aaron Carter and Karina Smirnoff Get Ready to Rumba

ET joined Aaron Carter and his pro partner Karina Smirnoff at their "Dancing with the Stars" rehearsal, where they dished on preparing for the rumba, and Aaron revealed whether he's asked out his ballroom crush, "Dancing" pro Chelsie Hightower!

"She respectfully rejected," Aaron tells us. "But it was respectful."

When asked by ET if he has an ideal first-date scenario in mind, Aaron said, "I'm going to keep it professional right now. I respect her. She wants to win, also, with her partner. And I don't want to jeopardize that and I don't want to get in their way."