Taylor Swift's New Diet Coke Ad Is Also An Ad for Her New Single '22'

Taylor Swift's new Diet Coke ad will make its official premiere tonight during American Idol, but on Wednesday a first-look preview popped up on YouTube.

The clip shows Taylor imbibing her favorite beverage while penning her latest single, "22," interspersed with clips of fans singing along gleefully. It's mega cute — but of course. This is Taylor Swift we're talking about here.