'Voice's' Blake Shelton: Simon Cowell 'mouthing off,' 'must just have more free time than he knows what to do with'

"X Factor" creator and judge Simon Cowell has been making headlines recently because of his complaints that NBC is airing three nights of "The Voice," which means night three overlaps with the premiere of "The X Factor" Wednesday (Sept. 12).

"Voice" mentor Blake Shelton fires back on Access Hollywood, saying, "Every time I turn around the guy is mouthing off. Don't y'all wish you had time to sit around and b**** and moan like that guy does? Every time I turn around, he's mouthing off about our show."

"It's like -- do your own show! Come on! Put something together there and do your thing," Shelton continues. "We'll just do ours and we won't mouth off about you. I wish I had that much time. The guy must just have more free time than he knows what to do with."

"There's room for all these shows. That's what frustrates me when I hear the bickering," Shelton concludes. "I'm like, 'We're all doing pretty good. High five!' But I think the thing that the other shows probably took notice of was the four of us on 'The Voice,' we're not judges."

What do you think, fans? Is Blake right? Or does Cowell have a point that "The Voice" doesn't need to be on three nights this week?