The operatic pop group insisted that the singer was the "obvious" standout of this year's competition.
Sébastien Izambard told Digital Spy: "It's obviously got to be Misha B, hasn't it? She's incredible."
David Miller added: "I have a hard time watching the show because it reminds me of early on in my operatic career when I would audition for things. The feelings and memories of the stress that come out are hard to cope with.
"You see the approval they crave in their eyes and I connect to that - it's so difficult to watch!"
Discussing when the four-piece appeared on the series in 2008, Urs Bühler confessed it "stressed" the band out, adding: "It's very intimidating and you're surrounded by people who so badly want to make it."
Il Divo release their new album Wicked Game on November 28.
> Read Digital Spy's full interview with Il Divo
> Il Divo tease new album Wicked Game - pictures
Watch Il Divo perform 'Wicked Game' below: