The scenario: A string of late nights and early mornings means you've had zero time to wash your hair, and like Jessica over there, it's starting to go beyond "grunge" and into plain ol' "greasy."

The solution: Meet your new best hair friend: dry shampoo. Sprinkle or spray some on your roots, massage it in and watch the grease disappear (try Klorane ECO Gentle Dry Shampoo with Oat Milk, $18). If you're out of dry shampoo or don't own any, use baby powder, just make sure to really work it in so you don't have dusty-looking white roots.

And if you're out of both those things? Then make the grease look intentional by slicking all of your hair back into a sleek ponytail -- and maybe spritz some perfume over it to cover the smell. Or just add a hat like Ashlee Simpson (maybe she should have loaned it to Jessica).

The scenario: You're bored and decide to try that box of dye you've had under your sink for months. Unfortunately, you're left with a scary-looking mess.

The solution: If you absolutely hate your new color, wash it out asap with a clarifying shampoo or even dish soap. This should help fade it somewhat (shampoo multiple times if needed), but it needs to happen fast, before the color fully sets into your hair. If that doesn't work, then you'll have to head to a professional, because unfortunately, trying to repair bad color yourself will likely make matters worse.

In the future, heed this color advice:

1. Never go more than two shades lighter or darker than your current color at home, trust us, it will not end well.

2. Follow the directions on the box exactly, paying close attention to the time.

3. Have a friend help you apply the color so you get even coverage and apply the color in a timely manner.

The scenario: You splurge on a spa manicure and your nails look fab -- until you smudge them while putting on your seatbelt to drive home. Or maybe you make it past the smudge-window, but then get a chip like two days later.

The solution: Manicurist Fricke says the best solution is to have the polish with you (so BYO bottle to the nail salon next time). That way you can place a dot of polish on the smudged or chipped area, let it dry, then apply another coat over the entire nail to even it out.

If you don't have your polish but you do have a nail file, you can make a chip slightly less noticeable by filing away the chipped part of your nail (or at least some of it) and then even out the rest of your fingers.

The scenario: Your friend invites you out to happy hour, which turns into dinner, which turns into after-dinner cocktails and the next thing you know you're stumbling home late night -- oh, and you have an early work meeting the next day.

The solution: Bosso and Campo have a foolproof morning routine to make everyone think you got a full eight hours last night and didn't empty one too many glasses of Pinot Noir. Here's what to do:

Step 1: Take a warm shower or bath and use a citrus-based body wash like Bath & Body Works True Blue Spa Need a Margarita Citrus Body Scrub, $13.50 (irony not intended) and use a face scrub such as Dermalogica Daily Microfoliant, $50. It'll get your circulation going to put some glow back into your skin, Campo says.
Step 2: Drink two glasses of water and apply a moisturizing facial mask like Paula's Choice Skin Recovery Hydrating Treatment Mask, $14.95. Wear the mask while you make breakfast. Campo suggests an omelet with coffee or tea and orange juice, while Bosso swears by juice made with a handful of raw spinach, four carrots and an apple (no guarantees on the taste though). Wash your mask off and eat breakfast.
Step 3: Apply a rich moisturizer (Bosso loves Dermalogica Age Smart Super Rich Repair Moisturizer, $77) and put in some eye drops.
Step 4: Now that your skin is somewhat back in shape, it's time for makeup. Both Campo and Bosso say less is more when you're hungover -- too much and you just emphasize the fact that you didn't sleep much last night. So use a little concealer and sheer foundation (Bosso recommends Nars Sheer Glow Foundation, $42 applied with Sigma Duo Fibre F50 brush, $16). Next apply blush to put a little life in your face, curl your lashes to open your eyes and do a quick swipe of lip gloss. Those drinks will feel or at least look like a distant memory ...

The scenario: Despite your liberal deodorant application, the hot weather (or nerves) is making you sweat right through your shirt.

What to do: A little prep work can prevent this from happening, or at least lessen the damage. First, apply deodorant the night before -- this will give it time to soak into your skin (even if you shower the next morning). And when you shower, use an anti-bacterial body wash like Dial Body Wash, $7.89 with a gentle body scrub such as Origins Modern Friction for the Body Nature's Gentle Dermabrasion, $34 to get rid of dead skin cells -- it's these two factors that contribute to smelly pits.

Apply deodorant again in the morning when your skin is completely dry so it can absorb fully. If you know you're going to get sweaty, try wearing light, breathable fabrics in colors that won't show as much of a change when they're wet (like black or navy). If you're still showing pit stains, head to the bathroom to dry your shirt off with the hand dryers or paper towels and reapply deodorant if you can. If all else fails, try not to do much waving or hugging.