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(TMZ) - UPDATE 2:01 PM PT - Ora's doctor, David Farcy, tells TMZ Rita was treated for heat exhaustion and dehydration.  She's been discharged and Dr. Farcy says she's fine.  Rita was in the middle of a photo shoot for Madonna's Material Girl campaign in Miami when she was taken ill.


(TMZ) -British pop singer Rita Ora - who had the hit song, "R.I.P." - collapsed on the set of her photo shoot in Miami Beach today ... and was rushed to a hospital by ambulance according to photographers on the scene, TMZ reports.

Photos show the 22-year old singer/model/actress - eyes closed - being loaded into the ambulance on a stretcher ... attended by emergency personnel.  So far, no word on what may have caused her to collapse.

Ora - who famously dated Rob Kardashian last year - was reportedly preparing for her photo shoot on the beach near the SoHo Beach House hotel when she fainted in her makeup trailer.

Story developing ..

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