Jelena fans, you might want to sit down for this one.
Just when excitement over Justin Bieber's "feels"-inducing Instagram throwback pic was starting to die down, the singer's ex, Selena Gomez, showed up to support him at his Los Angeles concert on Wednesday. An eyewitness told ET the singer looked "gorgeous and happy" at Bieber's Purpose show.
The Staples Center's official Twitter account announced that Gomez -- along with Kanye West, Tori Kelly, and a few members of the Kardashian-Jenner clan -- was attending the third night of the Biebs' L.A. concerts, but they certainly knew which name to list first to whip fans into a frenzy.
Bkstg, a music fan app, also claimed to have run into Gomez "in a hallway" at the show.
Things we've done so far at #purposela3: Ate nachos. Gave Bkstg fans fun gifts. Ran into Selena in a hallway.— Bkstg (@Bkstg) March 24, 2016
Eventually, a couple of lucky fans spotted Gomez watching the show from the safety of the sound booth, but she moved around the whole concert.
Unsurprisingly, Bieber fans had something to say about the singer's presence at her ex's concert:
OMG SELENA IS AT JUSTIN'S CONCERT OMGGGG YESSSSS— Jelena_0122 (@rbdlove06) March 24, 2016
omgosh supposedly selena is at the #PurposeLA3 😍😍😍— Selena and Justin ❤️ (@Biebz1994xoxo) March 24, 2016
SELENA IS THERE— gigi (@CaliforniaOLLG) March 24, 2016
SELENA IS AT JUSTINS SHOW IM CRYING I REPEAT— ¡wendy! (@fiercemadison) March 24, 2016
SELENA IS AT JUSTINS SHOW RIGHT NOW pic.twitter.com/iwZx4i9LkI— lovesick julie (@TacosWithJacob) March 24, 2016
Earlier this week, Bieber teased Jelena fans with throwback pic of the two sharing a smooch, captioning it simply "Feels."
See more in the video below.