Premise: The Voice (U.S. TV series) . Based on the original The Voice of Holland , the concept of the series is to find currently unsigned singing talent ( solo or duets , professional and amateur ) contested by aspiring singers , age 13 or over , drawn from public auditions . Members of the coaching panel include Adam Levine , Blake Shelton , Christina Aguilera ( seasons 1 -- 3 , 5 , 8 , 10 ) , CeeLo Green ( seasons 1 -- 3 , 5 ) , Shakira ( season 4 , 6 ) , Usher ( season 4 , 6 ) , Gwen Stefani ( season 7 , 9 , 12 ) , Pharrell Williams ( seasons 7 -- 10 ) , Miley Cyrus ( season 11 ) , and Alicia Keys ( seasons 11 -- 12 ) .
Hypothesis: The Voice is a diet.
Label: CONTRADICTION