No sex or booze for Britney Spears back-up dancers!

Britney Spears. (Photo: Greatstock/Splash)
Britney Spears. (Photo: Greatstock/Splash)

Los Angeles - Britney Spears has put her backing dancers on a sex ban.

The 34-year-old singer has just returned to her Piece of Me residency in Las Vegas and is so obsessed with impressing fans with her dance moves, infectious music and dazzling costumes that she's put her staff on a strict routine.

A source said: "Britney expects the same level of commitment from her dancers as she does herself, and so any distractions like sex and booze are off-limits. Anyone who doesn't play by the rules is out; it's as simple as that.

"There are plenty of dancers who'd kill to be in the show and are happy to do whatever it takes."

I ?? rock n roll #pieceofme

A video posted by Britney Spears (@britneyspears) on

The blonde beauty was reportedly spurred on to embed the strict clause into her backing dancers' lengthy contract following her split from TV producer Charlie Ebersol, whom she dated for eight months, last June.

The insider explained to heat magazine: "Since she's been single, she's been throwing herself into work. Brit's really feeling the pressure of Jennifer Lopez also having a Vegas residency and says she wants everyone to focus."

Rehearsals and tiaras ??

A photo posted by Britney Spears (@britneyspears) on

However, her staff probably weren't shocked to hear of Britney's demands as her father Jamie - who has been her conservator since her highly-publicised breakdown in 2007 - also banned booze from her Femme Fatale tour in 2011.