The sequence of the dance matches the song with Part A going with the verses and Part B going with the chorus. The order is A,B,A,B,A,B,B,B. This is fairly easy to remember as the music helps you out a lot. During the third Part A of the sequence, the music slows down and stops. Then Britney talks to a guy for a short period of the song. Here you will stop the dance. After the first 16 beats of Part A (where your right heel should be touched forward) you will hold there for the talking period and start the dance as you normally would from that position with count 17 and etc. After Britney says" Ohh you shouldn't have" a bang will be heard and that's when you will start and continue with count 17 as you normally would on that bang. Then follow sequence through.