Two months after telling David Letterman, "I'm single. I'm so good," Gomez reunites with Bieber, sharing a kiss and attending the Billboard Music Awards with the "Baby" singer. The pair was also previously spotted kissing during his April tour stop in Norway, but their reconciliation proves short-lived.
A rep for Gomez confirms that the star secretly checked into rehab for two weeks in January, saying, "Selena voluntarily spent time at [Dawn at the] Meadows but not for substance abuse." Prior to seeking treatment, the singer canceled the Australian leg of her tour. "I need to spend some time on myself in order to be the best person I can be," she said in a statement at the time.
BIOGRAPHY (top to bottom): Splash News Online; Larry Busacca/Getty