It happened at NYC's Madison Square Garden, where both The Weeknd and Bella attended a concert honoring rapper A$AP Yams, who died two years ago on Wednesday's date.
We know this thanks to Ben Baller, a celebrity jeweler, who captured both of them on his Instagram story.
Other celebrities who attended include Kendrick Lamar, French Montana and Tyler, The Creator.
Even though they weren't together in the pics, it'd be pretty weird if Bella and Abel went the whole night without saying "hi" when they were in the same room.
So I think it's safe to assume some sort of awkward, forced small talk went down that night.
So, it doesn't exactly sound like the ex-couple is on the best of terms right now. At least Selena wasn't at the concert, too.
This is probably extra awkward for Kendall and Kylie Jenner, who now have to pick sides between their two friends.
Earlier on Wednesday, Kylie was seen hanging out in NYC with The Weeknd.
And then that very same night, Kendall was chilling with Bella at the concert.
Oof. This whole thing is way too messy.
Again, this is why you shouldn't date in your ex's friend circle! It turns into this weird, incestuous web.
Anyways, the one person who doesn't seem to be bothered by this romantic tangle is The Weeknd.
Dude just dropped a new video. He's not thinking about any drama right now.
You just keep doing you, Abel!