Ashlee Simpson-Wentz, singer and actress, uses a diet delivery service like Bistro MD to stay fit post-baby. What are some other diet tips from The Doctors for new moms and others looking to lose weight and get in shape?

The five “fives” are as follows:
•    5 weeks – These five weeks are really just an intro to jumpstart your new healthy lifestyle. During these five days, however, you will drop a ton of weight.

•    5 meals a day – Not too shabby! The best diets are the diets that don’t starve you along the way.

•    5 ingredients per meal – Hmmmm. Definitely makes cooking easy, but is five ingredients really enough? According to Harley Pasternak (the dietician and trainer in charge), that’s all you need to make meals healthy, tasty, and fast. Included in this “Five” is that these five-ingredient meals will only take you five minutes to prepare! Good for Hollywood stars on a break from the set and good for you and your busy life!

•    25 minutes of working out a day – Okay, so this “five” is really “five times five”, but you get the point.

•    5 diet cheating days in 5 weeks – Oh, I like a diet that lets you cheat! Once a week you can ease up on yourself a bit. Won’t say no to that!

In addition to these things, grand diet master Harley P. sets out recipes ideas, a food log, a fitness plan, a meal planner, and other weight loss tools that’ll make things easy for you. You can even order meals – talk about easy!

Still not sure if you’ve got what it takes to be Hollywood trim and slim? Just ask Jessica Simpson, Eva Mendes, John Mayer, Alicia Keys, and Kanye West—they’ve all worked with Harley Pasternak and look at them! If that’s not motivation, I don’t know what is!