As well as choreographing the video, Spears also co-directed but chose to use her "alter ego" in the credits.
The singer told MTV's TRL Monday: "I kinda think she's like my alter ego whenever I feel like being mean or possibly like bustin' people around to get stuff right.. It's kinda easier to be called 'Mona Lisa' instead of Britney."
She also revealed that making her directing debut was a doddle. "It's really kinda simple. It's about going into a club and everyone's just kinda staring at you and you're like, 'get up and do somethin'!' You know? So just trying to get everybody to get up and dance and stuff like that. That's basically it."
'Do Somethin' is released in the UK on February 14.