First it was the Breton stripes that caught our eye, then the jolly 'You Me Capri' slogan... Then the fact that the whole fash pack was wearing the same t-shirt that made us think; where on EARTH is this from?
So, we tracked it down... And it's from the MILLY for DesigNation collection, which launched in April this year, and has been seen in the wardrobes of the A-list ever since.
Though some slogans are random at best, Michelle Smith, designer at MILLY, who attended the New York launch alongside Olivia Palermo and Zozia Mamet, said the collection 'was inspired by [her] trip to Capri'. Explanation enough for us.
As the sixth designer for DesigNation (previous designers number Narciso Rodriguez, Derek Lam, Peter Som, Elie Tahari and Catherine Malandrino), Smith had big shoes to fill. But judging by the celeb-heavy fan base of the 71-piece collection - Kate Bosworth, Jaime King, Olivia Palermo to name a few - it's more than lived up to expectations.
The best thing about the classic striped t-shirt? It's only $28 (about £18), down from $40. The worst thing? It's only sold at Kohl's in America, or Kohl's online so you've got a shipping fee to add on.
But, it's worth it. Don't believe us? Check out its fashion fan base...
That shipping fee is suddenly not looking so bad, huh?