Mariah Carey on the time she signed Rihanna's, um, chestTo play this video you need to enable JavaScript in your browser.This video can not be playedMariah Carey on the time she signed Rihanna's, um, chestCloseListen to the full episode on BBC Sounds.SectionNewsPublished12 AugustShareclose panelShare pageCopy linkAbout sharingRelated topicsMariah CareyFollow Mariah Careyclose panelYou are now following Mariah CareyUpdates from your News topics will appear in My News and in a collection on the News homepage.Read description