Rita Ora suddenly collapsed while in her makeup trailer near the SoHo Beach House hotel in Miami today, November 19th, during a photo shoot for Madonna's Material Girl campaign.  Photographers flocked her trailer as she was laid out on a stretcher and taken to the hospital via ambulance.  One photo shows Ora appearing to cling to the shoulder of an assistant while she was carried out of her trailer.  

According to TMZ, after Ora was examined by her doctor, David Farcy, he discovered that the reason she fainted was dehydration and heat exhaustion.  Dr. Farcy determined that she was well enough to be released and discharged her from the hospital, at which point she returned to her hotel appearing to be in good spirits.

Source: tmz.com