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%

(--It's not really shocking that "The Voice" did so well . . . but it's kind of an awkward list, since "American Idol" just added three new judges, who haven't even appeared on an episode yet.)