The idea with a retro style is to hint at a bygone era, not look like you were actually alive during it. This exhausted style ages the beautiful Jovovich. Danger lurks in taking retro looks too far, too fussy, too overworked. The result is an old-looking you instead of you with an old-time look. See more Milla Jovovich hairstyles.

Your mantra should be: never look like you tried too hard. Ellen Pompeo pulls off Depression-era finger waves beautifully while keeping her look tasteful and touchable. Letting the style speak for itself and downplaying accessories, makeup, etc. is a great choice. This was a great week in hair for Ellen and other celebrities.

Did we mention that you should never look like you tried too hard? Ms. Pompeo's fifties style suffers from a case of over-teasing, over-doing it and just plain going overboard. As a general rule, if you could successfully hide a hamster in your hair, you've gone too far.

Behold the Queen of Retro. Von Teese has made her fortune as a virtuoso in vintage goodness. While she may do more than hint at the past with her look, she knows what looks good on her and sticks with it. The secret is to create a retro look the way it should have been, not the way it really was. This was a great week in hair for Dita and other celebrities.

Proof that anyone, even the Queen of Retro, can goof it up. That's how treacherous the retro path can be. Retro styles threaten to age the wearer and look matronly rather than glamorous. It's always better to dial back and modernize a bit. This look is more Mrs. Cleaver than Betty Page.