We've seen the naked nipples of sweet songstress Lily Allen many a time, thanks to her suffering what appears to be an allergy to bikini tops.

But although Lily Allen topless is a familiar sight, we've never actually gotten a good look at her rumored ultra-rare third nipple . . . until now!

Lily was recently interviewed on Dutch television, and the presenter asked her about her mammary anomaly.

Instead of getting angry or embarrassed, Lily gamely lifted her shirt and showed off the tit-illating appendage, even sharing, "it gets hard when you touch it!"

It sure does, Lily. It sure does.