Hard at work preparing for her residency in Las Vegas, Britney Spears arrived in style at a dance studio in Sherman Oaks, C.A. this morning (October 24).

Wearing her hair up in a messy bun, the "Work Bitch" singer showed off a pair of aviators, and wore a cream blouse, black skinnies and tan heel boots.

The 31-year-old pop singer is rehearsing for her upcoming two-year stint in Las Vegas, which kicks off on December 27th of this year, however her upcoming performances are rumored to fall short of excellence, due to rumors that Britney will lip-sync her songs.

Denying such accusations, Britney responded on Chicago's 103.5 KISS FM earlier in October, saying, "I'm definitely going to be singing live. I always sing live. It doesn't sound so great all the time, but I do my best."