Sexy Olivia Wilde may not be an Italian princess anymore, but she still walks a runway regally. We spotted the House actress sashaying down the catwalk for Liverpool Department Store’s Fashion Fest in Mexico City on Friday, where she was rocking a gorgeous royal blue gown.

Olivia made the cover of next month’s Cosmo, and we couldn’t help but notice the dramatic difference in her cleavage size on the magazine versus our unretouched shots. Our friends at Celebitchy agree, noting that it looks like they’ve boosted Olivia’s barely A cup to at least a B. Totally unnecessary.