Lily Allen wardrobe malfunction PHOTOS: 'Sheezus' beauty suffers sans-bra nip-slip during London concert in fluffy pink crop-top

Lily Allen shared some new tunes with fans during a highly-anticipated performance at London's Shepherd's Bush Empire on Tuesday evening (April 29). She also flaunted some rather racy cleavage while donning a funky pink crop-top.

The songstress' new album Sheezus is currently scheduled for a May 2, 2014 release. Check out the hot new single here:

Perhaps a sexy nip-slip is the best way to promote her third upcoming studio album?

Allen wowed in a bright, sparkly wardrobe highlighted by a fluffy, midriff-baring top. At one point during the concert, the 28-year-old English beauy began dancing around and throwing her hands up in the air - totally forgetting that she wasn't wearing a bra. She accidentally exposed her left nipple, and quickly tried covering up the epic fashion faux pas with her hand. But not before photogs captured some pics of the rather embarrassing wardrobe malfunction (check out more photos here).

Oops! But Allen continued on like a champ.

Which isn't too surprising - the "Air Balloon" singer definitely isn't afraid of flaunting some major skin:

lilyallen: "Warming up in my pants, luckily @panosphair is there to document these dressing room moments."

Oh, and did we mention that she actually has a third nipple?

So really no big deal!

Other than the nip-slip, Allen had a rather successful show: