Lily Allen suffered a pretty embarrassing wardrobe malfunction during her London concert Monday night. But, you know what they say: The show must go on! 

The 'Sheezus' singer was performing at Shepherds Bush Empire Theatre when one of her ornate costumes -- a pink feather boa-like top -- accidentally moved a little too far to the side, exposing her nipple.

Allen, ever the professional, tried to cover up the mishap with her hand and just kept right on singing.

While the "oops!" moment is fairly embarrassing, you have to remember that the singer is extremely confident and comfortable with herself. After all, as she sings on the title track of her upcoming album, "Give me that crown, b--- / I wanna be Sheezus."

Not to mention that this isn't the first time that Allen has showed her nipple.

In fact, Allen has a tiny third nipple that she flaunted during an on-camera interview, lifting up her shirt to proudly show the world her extra body part. If that doesn't scream confidence, we don't know what does.

See the photo of Lily Allen's wardrobe malfunction below:

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-- Michelle McGahan, PopCrush

Source: PopCrush