By day three with no washes (and six bike rides wearing her helmet to and from work, a volleyball game, Nike training club, and oh -- a couple of barre classes as well) Paulina employed every woman's two-second beauty trick to feel better: red lipstick. A bright lipstick draws focus to the mouth and distracts from a lackluster hair day. "My hair is pretty low-maintenance, so the ends were still shiny and soft but my roots and bangs were starting to get greasy," Paulina says.

"By the fourth day I couldn't stand bangs in my face anymore," Paulina says. When all else fails (even that killer pink lipstick), an embellished headband covers your roots and distracts from a less-than-stellar hair day. Utilize the oil that's already in your hair to your advantage and enjoy a frizz-free, pulled back style.

After five days we threw in the towel -- no pun intended -- and Paulina was able to wash away the week's residue. Maybe we could have made the blowout last longer, if we asked Paulina to avoid all of her sweat-inducing activities, but the goal of the experiment was to find out how to make a blowout last while still going about your daily life. Otherwise, really, what's the point? To thoroughly cleanse your hair of environmental pollution, build-up and grease, use a clarifying shampoo like Elucence Volume Clarifying Shampoo, $6. "After seeing how I could make my style last I've thought about straightening my hair on a Sunday night and wearing it to work Monday and Tuesday, so I won't have to think about my hairstyle," Paulina says. "Plus, not having to think about my hair made me spend an extra minute on my makeup. I would actually take the extra time to grab the bright lipstick and an eyeliner."