Las Vegas, Singer Britney Spears has reportedly put her backing dancers on a sex ban.

According to a source, the 34-year-old, who has returned to her “Piece of Me” residency here, 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, reports femalefirst.co.uk.

“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,” Heat magazine quoted the source as saying.