Last November, Jessica Alba was doing ads for Microsoft's Windows Phone.

Looks like she wasn't that into the Windows Phone, because she was photographed using an iPhone at New York's Fashion Week.

A Microsoft spokesperson reached tells us her contract expired in May, and that she still uses her Lumia phone from time to time.

This isn't great PR for Windows Phone since she's shifted to iPhone seemingly as soon as she could.

Alba isn't the only person that's been caught cheating like this. BlackBerry celebrity spox, Alicia Keys, was busted for using an iPhone, too.

H/T: Lessien

Getty Images/Stephen Lovekin

Getty Images/Stephen Lovekin

Getty Images/Stephen Lovekin