Pamela Anderson and Salma Hayek are two Hollywood sex icons, but neither looked the part this week.

We don’t mind the former "Baywatch" babe's conservative dress (she's reportedly toning down her look), but what is up with that hair?

And Salma -- who is married to the head of Louis Vuitton -- looked super sloppy. Get those pants hemmed!

Plus former child-star Tia Mowry ("Sister, Sister") was barely recognizable with her two-toned hair and bad makeup.

Check out all of this week's worst dressed celebs in the gallery above!

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