T-Swizzle is back on the East coast and back to work!

Taylor Swift headed to a business meeting today in NYC, and the singer looked adorable and upbeat as she made her way into the building. The songstress didn't look like anything was bothering her, but the other night when she ran into her ex Harry Styles at Caleb Followill's birthday party in L.A. she certainly did!

The Grammy winner and her group of friends was approached by the One Direction crooner and his mates in the lobby of the Sunset Marquis hotel during the fete, and video of the encounter shows the blonde beauty completely ignoring the British hunk before walking off. That's some serious shade, and definitely not the behavior of someone who is over her heartbreak.

Tay Tay must have her panties in a bunch about the rumors her boybander former love is romancing Victoria's Secret model Nadine Leopold!