Lil - who was guest presenting the comedy show - was in the middle of hosting a quiz when comedian Alan Carr made a quip about her extra udder.
And the 21-year-old - determined to prove that her third nip does in fact exist - lowered her top to reveal her chest for the cameras.
Check out the vid here - to make you 'smile'...
Lily Allen: I’m an alcoholic>>
Lily Allen: I have lesbian dreams>>
Lily Allen: Fashionistas think I’m fat>>
Lily Allen: Kate Moss saved me from Glastonbury bullies>>
