ET is there as Grammy winning beauty Mya and her pro partner Dmitry Chaplin rehearse a dance that is new to "DWTS" — the lambada -- and Mya dishes about the sexy look and smooth moves she plans to showcase! Mya tells ET that the dress she intends to wear could fit in an envelope. She said, "This would be the most risqué so far, but we have a say in our costumes, so it’s covering certain things up."  She and Dmitry will stay traditional with the dance itself. The singer told ET, "We are sticking the five steps that lambada consists of and coloring it around that."