Even though it's a new year, it's also the end of an era -- Britney Spears has ended her Las Vegas residency.
Both Spears' Planet Hollywood audience and "New Year's Rockin' Eve" viewers got to watch her final performance Sunday night.
Brit sang "Work Bitch" and "Toxic" for the ABC broadcast, the big night marked the end of what was originally slated to be 2-year residency. Due to high demand, Spears extended her Vegas show for an additional two years.
Throughout the entire run, she's banked more than $100 million.