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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.
WATCH: Selena Gomez Twerks to Rihanna's 'Work' While Partying at Rooftop Bar in Texas
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.
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:
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.
WATCH: Justin Bieber Shares Throwback Photo of Selena Gomez Kiss