I always had a fascination for this cover. I feel like it captures the purest essence of what pop music is. You can sense the charisma, mystery, electrifying music and that vulnerability that we can all relate to.
Britney embodies that perfectly.
I agree with @Slayer it wasn't as big in person but still very impressive.
However what I did not realize in videos was how HUGE the CO2 cannons effect at the end of Circus were going to be!
I was my first time seeing her and I cried when she appeared