has spoken up about her mysterious hospitalization. The "" actress explained to reporters on Monday, June 13 that malnourishment sent her to the hospital last Thursday, June 9, PEOPLE reported. "I was just very malnourished, so I was low on iron and exhausted," so she explained.
The 18-year-old at Santa Monica Place on Monday for a show that was rescheduled from Friday, June 10 because of her hospitalization. Performing "Who Says" and "A Year Without Rain" in front of more than 500 young fans at the outdoor mall, she told them, "I want to thank you so much for coming. If you guys came on Friday, I'm so sorry that I couldn't be here. ... I love you guys very much."