The Tuesday, March 18 episode of The Biggest Loser is about to get a little more stylish — Project Runway god Tim Gunn will stop by The Biggest Loser for a special appearance.

Tim Gunn will help out The Bigget Loser contestants in the makeover episode — contestants will get new duds and hairstyles. Check out The Biggest Loser on Tuesday at 8 PM (ET/PT).

“The Biggest Loser” finale ends tonight – but will a woman emerge the winner this time? It’s the final weigh in – with the big winner (or loser, in this case) grabbing the $250,000 prize. Who of the final four will win “The Biggest Loser? – Hollie, Isabeau, Julie or Bill?

Host Alison Sweeney is on hand to do the honors.

“The Biggest Loser” season 5 will debut on January 1st, featuring couples (mother/son, friends, father/daughter, old teammates).