Almost every season one lucky challenge winner gets a "makeover" consisting of a haircut and new clothes. It's officially overkill now since this is probably third time there's been a wardrobe makeover this season. Makeover montage and reactions inside.
Admittedly, its not that drastic of a change for Gail, but all those sparkles and the exuberant stylist do help quite a lot. *SPOILER ALERT* Too bad we won't be seeing her new look for much longer as she got kicked off for sucking just a bit more than the other chefs during dinner service.