Billy Joel's Daughter BUSTED at Fashion Week

2/9/2013 8:00 AM PST
Doing her best Minka Kelly impersonation, Billy Joel and Christie Brinkley's daughter Alexa Ray Joel showed up to a fashion show in NYC on Thursday ... and proved she's not the girl she used to be just six months ago.

The 27-year-old has grown into quite the woman.

We're just sayin'.