Prepare to lose your mind, Jelena shippers. Selena Gomez was in the house.Eagle-eyed concertgoers spied the pop star at last night's Justin Bieber performance in Los Angeles. The show of support comes just days after Bieber shared a throwback photo of him and his famous ex kissing. Gomez commented "perfect" on the post, prompting many fans to speculate about a possible reunion.These photos of her from Bieber's concert will no doubt add fuel to the fire. Here she is watching the show.