We learned a lot about Britney herself, like the fact that she doesn't ~really~ know what "Oops... I Did It Again" is about.
She also told James that she wants three more kids in addition to the two she already has.
But she is done with (marrying) men for good.
That's all well and good, but obviously the best part of the whole thing was the amazing throwback tunes.
Because seriously, who HASN'T performed a choreographed dance routine to a Britney classic at some point in their lives?