If I could do beauty rehab for anything (besides mullets and black box color) it would be eyebrows.
Eyebrows are the frame of your face. Done the correct way they can make your eyes look big and beautiful, accentuate your cheekbones and make your makeup look FIRE! Done incorrectly they can become an eyesore, make your forehead look huge, and give you alien face. The worst ever is sharpie eyebrows. Its hard to believe that these things truly do exist... but they do. These women shave off their eyebrows and then draw them back on with some sort of liner, or yes, sharpie marker. They do the sharpie marker cause it doesn't run like liner does, and you can tell its sharpie by the dull appearance of the brows.
Either way it is a seriously unattractive way to fix your brow situation. If you are an over tweezer, a shaver, a self waxer, or one of those people who gets your brows done by the oriental nail places (which, btw are NOT licensed to do eyebrows in any way. Nail techs are not licensed to do waxing services of any kind!) there is hope for your eyebrows!
If you let your brows grow, untouched for 6-8 weeks you will usually have the beginning of what your natural shape of eyebrows would be. Once you have a good idea of what they will look like, you go to your salon or spa and get them waxed. Even if they are not fully grown we can usually see the shape of which they would grow, and shape them to flatter your face.
Please, do NOT come in expecting your eyebrows to look exactly like Rhianna or Ellen. No two people have the same eyebrow shape, so there is no guarantee that your eyebrows will look ANYTHING like such-and-such's eyebrows. Its just not possible. But please so express what you would like to possibly see and be open to suggestion.
Your eyebrows should look natural, and flatter your face. NOT look surprised all the time, run down your face in the rain, arch up to the middle of your forehead, or be a dull black 2 dimensional object!
(PS. Sharpies are also not meant to be used to cover grey... but that's a different blog)