(Getty Images) Los Angeles - Rihanna dedicated Diamonds to Prince as she performed in Canada on her Anti World Tour. She told the crowd: "Today is a very sad day in music. "A lot of us have started making music and listening to music because of Prince, so right now I just wanna honour him, me and my crew, and you guys. A spokesperson said: "As part of the complete exam, relevant information regarding [Prince's] medical and family history will be gathered. "Midwest Medical Examiners Office will not release information until the exam is complete and all results are obtained.