Workers Of Britney Spears' Las Vegas Show To Be Drug-Tested, Pat Down At Random

Britney Spears' camp, leery the mercurial star still might prone to toxic outside influences, have instituted drug testing for the staffers of her Las Vegas residency show Britney: Piece of Me, to ensure their investment is well-protected.

“Anyone who works with Britney, be it her trainer or her hairstylist, has to be tested and open to random pat-downs,” a source tells this week's STAR. “After everything she’s been through, they just want to keep her far away from drugs.”

The Grammy-winning songstress remains under a conservatorship managed by her father Jamie after a series of bizarre incidents from 2006 until 2008 nearly derailed the singer's mega-successful career.

As a result of such safeguards, her current boyfriend David Lucado was forced to undergo a background check before he began dating her.