Make it work, Christina!

Grammy Award-winning singer Christina Aguilera, 28, will be a guest judge on Project Runway, Usmagazine.com confirms.

She will appear alongside host Heidi Klum, fellow judge Nina Garcia and fashion designer Bob Mackie (Michael Kors won't be judging that week) in a segment to be aired Oct. 15 at 10 p.m. on Lifetime.

Check out photos of stars who could use a fashion makeover

Other guest judges on the show this season have included Lindsay Lohan, Rachel Bilson, Rebecca Romijn and Eva Longoria Parker.

Tell Us: Do you think Aguilera has the style savvy to critique this season's designer contestants?

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Do you think Christina Aguilera has good fashion sense?

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Do you think Christina Aguilera has good fashion sense?