Britney Spears' Hair Extensions Fall Out During Energetic Vegas Show

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Don't ever accuse Britney Spears of not dancing hard enough.

The 33-year-old singer was putting on a particularly fierce performance of her hit "Do Somethin'" during her Piece of Me show in Las Vegas last week, when a noticeable chunk of her blonde hair extensions came out mid-chorus.

Though like the true professional she is, Britney barely batted an eye, and didn't even seem to notice the little hiccup.

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This isn't the first style malfunction the "Oops!... I Did It Again" has suffered during her Piece of Me tour -- in December 2013, her glittery jumpsuit popped open in the back during her performance of "Circus," threatening to expose a little bit too much of the pop princess.

But as the seasoned pro will probably tell you, the show must go on!

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One singer who’ll undoubtedly feel her pain is Madonna, who recently suffered a horrible fall during her "Living For Love" performance at the Brit Awards.

Watch the cringe-worthy moment below: