iHeartRadio recently conducted a poll to determine America's favorite singing competition show judge.  It included the judges from "American Idol", "The Voice", "X Factor" and "Duets".

--"The Voice" scored FOUR of the Top Five spots.  Somewhat surprisingly, BLAKE SHELTON came in at #1, with 20.7% of the vote . . . and neither SIMON COWELL nor RANDY JACKSON made the list.

--Here's the Top 10, along with the percentage of the vote they received.

1.)  Blake Shelton, "The Voice",  20.7%

2.)  Adam Levine, "The Voice", 15.8%

3.)  Mariah Carey, "American Idol", 10.4% . . . Even though she hasn't even started yet.

4.)  Cee Lo Green, "The Voice", 10.2%

5.)  Christina Aguilera, "The Voice", 9.6%

6.)  Keith Urban, "American Idol", 9.4% . . . He hasn't even started yet, either.

7.)  Kelly Clarkson, "Duets", 7.9%

8.)  Britney Spears, "X Factor", 5.8%

9.)  Nicki Minaj, "American Idol", 5.1% . . . She hasn't even started yet.

10.)  Demi Lovato, "X Factor", 5.1%