Selena Gomez has been hospitalized a few times for low white blood cell count which could be a side effect from the kidney transplant. The second time she was back at the hospital was when she lost it. TMZ says quote, "Selena had "a meltdown" and "freaked out." Selena tried ripping the IV's out of her arm. Several sources called the episode "an emotional breakdown." Now she's getting treatment at a mental health facility. More here