SPOTTED: Just before the minute mark I think Lulu missed a move whilst off camera. She can just be seen on the edge of the picture standing still waiting to restart.
I'n not so sure about that Doc, and I'm not trying to show any favouritism for the cute one here. The way I see how it works, and it's kinda clever is, the lyrics go :-
"You're Once" - and it's just Sue
"Twice" - and it's now Sue with Patti moving in from the right
"Three times a lady" - and now it's Sue with Patti and Lulu from the left.
The whole point is Lulu doesn't move until it's the "Three times a lady bit" otherwise the sentiment and meaning of the lyrics if all three are dancing at the once/twice bit is lost.
I don't know how others see it but that's my take on it.
SPOTTED: Did we miss an incipient Sue solo at the end?
Not bad for someone who doesn't normally see much. It does look like the editor robbed us of a bit of the lovely Sue, you can see her moving away from the other two just before Lionel and Co get in the way!