America's Got Talent Nick Cannon explains he has been diagnosed with lupus nephritis 03/10/2012 "America's Got Talent" host Nick Cannon says he has been diagnosed with an autoimmune disease, lupus nephritis. Read More RELATED NEWS Sharon Osbourne and Lady Gaga in online feud over Kelly Osbourne'America's Got Talent' singer Timothy Michael Poe "never intended to hurt anyone" with military claimsSharon Osbourne: New 'America's Got Talent' judge Howard Stern "a lot of fun" TAGS: America's Got Talent Mariah Carey Piers Morgan Nick Cannon
