Will Roller Skates be the Downfall of 'America's Next Top Model'?

Only seven hopefuls remain on the current cycle of "America's Next Top Model" and this week they will have to satisfy guest judge and top American designer Zac Posen to make it one more week in the competition.

Zac surprises the girls at their Venice Beach house and tells them they will be wearing his fall 2010 collection for this week's runway challenge -- and when they do, they will be going head-to-head with professional models on the catwalk.

Then the girls have to put their personalities on the line when they shoot a commercial on roller skates!

Most of the girls haven't skated in years and are worried about falling down in front of Nigel Barker, who is shooting the spot, and Jay Manuel, but Ann is close to tears when her turn comes.

"A lot of people are going to laugh. It is something I have had to deal with my whole life because I am tall," says the model hopeful, who won best picture five weeks in a row. "I really don't know if I can do this."

Find out when "America's Next Top Model" airs tonight at 8 p.m. on The CW.

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