Britney Spears Instagram Selfies show the toll the pop singer takes for performing. Britney Spears took to Instagram to announce she is in the middle of changing up her Las Vegas Show performances. After two years, the "Toxic" singer revealed she is changing her Pieces Of Me stage show.

"Someone jokingly asked me what the hell I did yesterday," Spears captioned the photos. "Check out my bruises that's what I did! Working hard on the new show! Get ready!!"

Spears posted a snap of banged up legs on social media to prove that she is hard at work. The the 34-year-old star sports no less than 11 bruises on her legs with most concentrated on her knees.

Spears is currently on hiatus from her Las Vegas residency until February. Britney Spears is a pop icon. She is one of the most successful and celebrated entertainers in pop history. Her albums have gone Multi-platinum. She has won Grammy Awards. Britney went from Mousketeer to the fourth best-selling female artist ever in America.

In November the pop princess revealed that she was working on a new album

Britney's Las Vegas show celebrates one of the most illustrious careers in music history. Britney performs more than 20 of her worldwide hits, including "Baby One More Time," "Oops I Did It Again," "Toxic," "Circus," "Womanizer" and "Slave 4 U." The show includes new material from her recently-released album "Britney Jean" too.

Seventeen years ago, on Jan. 30, 1999 Spears topped the Hot 100 with her debut smash "...Baby One More Time" two months after 17th birthday. Britney Spears has since had five Hot 100 No. 1s. Her most was cent was in 2011 with "Hold It Against Me." Spears has also had six No. 1 albums on the Billboard 200. Spears' most recent record, "Britney Jean," dropped in 2013.

Britney Spears is one of the most provocative artists to enter the music scene in the last two decades. The former Disney star hit icon status for some of the most seductive performances in history. The "Baby One More Time" singer blazed a trail for modern day female empowerment. Britney has sold almost 100 million records worldwide.

Britney brought her show to Las Vegas, celebrating one of the most illustrious careers in music history. Britney performs more than 20 of her worldwide hits, including "Baby One More Time," "Oops I Did It Again," "Toxic," "Circus," "Womanizer" and "Slave 4 U." The show includes new material from her recently-released album "Britney Jean" too.