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Selena Gomez arrived at LAX on Saturday night, and the singer/actress looked rather down in the dumps when we snapped her photo. Maybe she's still reeling from her split with Justin Bieber?

Despite a recent trip to Park City, Utah with fellow famous couple Taylor Swift and Harry Styles, apparently Jelena have broken up yet AGAIN! The lovebirds reportedly ended their relationship last week after a huge fight in Mexico the day before New Year's Eve. A source tells Hollywoodlife, "Selena left Mexico that same day and Justin left for L.A. on December 31. They haven’t seen each other since.”

Selena then tweeted on January 1, “New beginnings. Fresh start. I love you all," and on Friday she posted a photo of herself talking to a Christmas tree and wrote, "Thanks for listening, bet you understand."

But it might not be the end! A source tells Hollywoodlife, "I wouldn’t be surprised if they got back together. They still both really care about each other. Justin has been upset about it. The splitting up and getting back together has been hard on both of them.” The source continued, “Justin’s devastated and pathetic right now. He’s calling her 100 times a day and she’s not picking up."