The internet's latest Barack Obama obsession? His unbuttoned shirt.

We've previously seen him in the classic suit and tie (including that famous tan look), mom jeans, flip flops, leather jackets, backwards dad hats and even swim trunks and a life vest. But now that he's returned to the spotlight, the former POTUS is teetering between professional and casual with his no-tie, unbuttoned shirts, and he's been sporting the style frequently since leaving the White House.

The latest iteration took place yesterday at the Seeds&Chips Global Food Innovation Summit, where he spoke about the dangers of climate change, which sent Twitter into an obsessed freakout.

But this isn't even the first time Obama has opted out of a button or two. It seems he's been skipping the tie ever since leaving office. Just take a look at some of his outfits in his public appearances post-presidency.

May 9, 2017:

May 3, 2017:

April 24, 2017:

Hosting a panel at the University of Chicago.

March 10, 2017:

Out in New York City.

No tie? No problem.

(h/t Washington Post)

Erica Gonzales is the Senior Culture Editor at ELLE.com, where she oversees coverage on TV, movies, music, books, and more. She was previously an editor at HarpersBAZAAR.com. There is a 75 percent chance she's listening to Lorde right now.