Oops, my clothes are coming off! Britney Spears needs help having sexy top zipped back up during Vegas show

It's been just over a week since she launched her razzle-dazzle Las Vegas show to much fanfare, but unfortunately Britney Spears has already experienced a wardrobe malfunction.
While belting out her hit Circus on Saturday evening, the 32-year-old's backside was exposed when her sequined top became unzipped.
Instead of getting flustered, the beauty kept singing as her back-up dancers came to the rescue, preventing her show from becoming X rated.

The calm before the storm: Just prior to her Saturday evening wardrobe malfunction, Britney Spears was enjoying belting out her hit Circus

There it goes: Then her top started to unzip, which a back-up dancer (left) took notice of

Britney Spears has wardrobe malfunction during Vegas show

Totally unzipped: At this point her top was nearly off, revealing she was bra-free

Britney already doesn't wear much during her Piece Of Men show at Planet Hollywood Resort & Casino. For most of the performance her legs, arms, chest and derriere are on full display.
So it was a shock to see her expose even more flesh as the malfunction resulted in exposing nearly the entire back side of the hit maker.
The accident also revealed one saucy detail about the blonde: she wasn't wearing a bra.

To the rescue: A stage mate ran to her help, zipping the top back up

The incident was caught by an audience member during the weekend performance who took a video of what could have been a major embarrassment.
The show - which saw Katy Perry, Miley Cyrus and Selena Gomez appear on opening night - has had other surprises as well.

She doesn't stop: The Louisiana native kept singing even though she nearly fell out of her clothes

Done: She soon became good to go, and appeared to even be smiling at the awkward situation

On Monday evening Lance Bass popped up on stage during the Freakshow portion as he was dressed up in black ears and walked around the stage like a chained animal, according to E!
The former boy bander didn't seem to mind as he had a smile on his face the entire time.
The same thing was done to Mario Lopez last week.

Purr: During this portion of the show the beauty brought Lance Bass up onto the stage

He liked it: The former boy bander stuck out his tongue after black cat ears, a collar and chest harness were placed on him

Wardrobe malfunctions have become common place in Hollywood.
In 2004 Janet Jackson revealed a bejeweled breast while dueting with Justin Timberlake during the Super Bowl, causing uproar.
More recently, in 2012 Sofia Vergara saw her green sequined gown split down the back during the Emmy Awards. She even tweeted a photo of the mini disaster.

Trouble with their clothing: Janet Jackson lost part of her top in 2004 with Justin Timberlake at the Super Bowl (left) while Sofia Vergara shared a snap of her torn Emmy gown in 2012 (right)

She'll be there for a while: The Toxic singer is scheduled to perform at Planet Hollywood for two years