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Biosilk serum ($12.49 - buy it here). It's inexpensive and multi-functional and I carry a minibottle in my purse at all times. Its for hair and skin so I use it to smooth the hair frizzies, moisturize my skin, add shine to my legs and arms, and it smells great so it also works as a great scent! (Photo: Getty/Biosilk)
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