Fids you were asking about Cha Cha Cha, the attitude is, as they always say, fun and a bit cheeky.
Legs should straighten, but some softness in the knee at times allows for contraction of the body movement, and track under the body. The feet should turn out ever so slightly and pressure should be maintained through the floor.
I always refer Joanna Leunis as a great example. She moves in an extraordinary way. So sharp and crisp!