For the Bridesmaids sequence, I wanted to differentiate the bride from the bridesmaids as they were filled in two contrasting colours - pink (a consistent colour featured throughout Bridesmaids and its promotional materials) and white (the bride). I therefore decided for these to feature at different times - possibly in time with the 3 beats of the backing track.
The bridesmaids imagery enters slightly before the circle forming the background fills the frame - this is so it enter in time with the music.