Rihanna had to actually cancel a huge Grammy performance today after her doctors warned her of the risks of performing. Just after her rehearsal for the Grammy award Rihanna’s doctor actually told her she needs 48 hours of vocal rest or she could actually hemorrhage her vocal cords which would not be good at all for any future vocal work. She was set to perform her brand new single “Kiss It Better” on the award show but it looks like she’ll have to wait a little longer to perform for her fans and hopefully her voice is fine.