"How on earth could they know that?" I hear you ask - well, unfortunately there is video evidence to support the esteemed rag's claims as the birthday party in question was featured on MTV's "My Super Sweet 16" series and, as you can see from the photo, it's definitely Cipriani standing in line waiting for his opportunity to strut his stuff.
I'm not sure which is more embarrassing - the revelation itself or the fact that he was rejected for the role by a horribly spoilt brat of a girl.
If you can bear to watch then the video is available here, but it does appear that, if Cipriani's rugby career continues to blossom, we're going to have to get used to a very different character in the England number 10 shirt.
Crikey, the bloke's even beginning to make Gavin Henson look drearily square.