This performance of Tell me your wish starts with a dance sequence where the guys from SHINee shake it with Jessica, Yu-ri, Yoon-a, Soo-young and Hyo-yeon.
Perhaps these groups have some kind of exchange program
Girls’ Generation ~ Tell Me Your Wish (Genie) with SHINee dance intro Live@Music Core 20090725
27MB 4:15 H.264/AVC 480×272 PSP Ready
Credit: source video from yoobin.skyrock.com