Tim Gunn: "Miley is Too Tarty"

Sick of Project Runway's subpar current season? You're not alone: Tim Gunn, the show's reigning fashion mentor is none too pleased with the current crop of contestants either.

"They keep walking around telling each other how great they are, and I keep saying to them, 'Someone is gonna go home,' " Tim tells OK!.

Who's the biggest culprit?

"We have Stella and her 'leatha,' " says the silver fox. "She's got to get away from that, and she's constantly defending, 'That's what I do.' Then you're nothing but a one-note. You better get prepared to pack your bags."

They're not the only ones to come under Tim's experienced eye for fashion — some celebs aren't exactly hitting a home run either, in his opinion.

"Miley Cyrus is just a little too tarty, forgive me," he says. "I don't want her to look like she's going into a convent school, but it's just a little too much for a 15-year-old. If I didn't know better, I'd swear she was 25!"

Tim's advice for Katie Holmes? Exactly the opposite.

"She went from looking like a little farm girl to looking like European royalty," he raves. "Now she needs to push back a little so that she doesn't look too dowdy or old."

Check out the second season of Tim Gunn's Guide to Style,  starting in October.