if what you are referring to is this little gif that is making the rounds, im not sure she muffed it.
harking back to my days as a girl group choreographer, it looks like two pairs of the ladies have what we in the industry call “business” and she didnt.
posh has no one to allemande around so she’s at rest for a measure.
me, i would have had her be doing something, especially on a stage as big as that one.
something like blowing on her nails.
but i dont think she blew it.
update: im being told she actually did blow it and was giving the evil eye to a female volleyball player who was making the moves on her man. #nevermind