. >> 45-year-old jen prepping for her role in the revenge thriller "peppermint."one to two hours a day six days a week. >> jennifer garner seems line somebody who works hard. >> she wants the gold sticker. >> reporter: other stars have gotten hot bods thanks to simone de la rue. >> legs all the way back. working your quads, hamstring and glutes -- >> reporter: reese's legs and these planks for kate hudson's abs. >> one, two, three, four, and down, two, three, plank -- >> reporter: simone's making it easy to do the jen garner workout. she's not a new app out, including diet tips, courtesy celebrity nutritionist kelly, getting body back after baby. >> kelly navak, amazing nutritionist. i've just had a baby and it's hard to get back in the saddle. but i think it's time. >> jessica alba. she's my soul sister. i mean, what a supportive and wonderful woman. >> reporter: jessica and jen drink this power smoothie every day. >> jen created this smoothie for me herself. using my formula, which is great. so it's chocolate protein, almond butter, flax, a handful of spinach, a