This entire show is dedicated to helping you live an A-list life on a budget, so Rachael turns to The Biggest Loser's Alison Sweeney for tips for making sure your figure and clothes always look great. "I think tailoring is a huge A-list move, and you can do it on a budget. Whether it's hemming your own jeans, tucking them up with tape," Alison says, while also encouraging you to buy clothes that truly fit. "Especially when people are going through weight loss or struggling - don't buy that dress that doesn't fit. You know it's just going to make you feel bad!"

She watches contestants lose huge quantities of weight each season on The Biggest Loser and says she's picked up a big tip for staying motivated during workouts. "Don't be a slob at the gym! I think if you dress in a cute outfit, or something that you like and feel good in, it's going to encourage you to look in the mirror, feel proud of what you're doing!" Alison shares more slim-down tips in her new book titled The Mommy Diet. "Everything I read when I was pregnant with both my kids was about how to take care of my children," she explains. "This book is for you! The idea is just how to fit in your own fitness and workout and nutrition, and that can help you be a better mom."

The slender star is showing off her figure at this year's Heart Truth Red Dress Collection Fashion Show, to raise awareness for heart disease. Rach walked their catwalk in 2007 and wants to help Alison prepare - so she challenges her to survive a red carpet obstacle course on our set! Click on the video to see her strut her stuff!