No plans tonight? Experiment with a new trend

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Every now and again, I take a litmus test on the latest style trends and report back. The insane ones --like daily colonics and implanted eyelashes -- are best left to the crazies. Here are a few easy, quick and sane fads suited for everyone.

Crystal Pout
Lips color trends veer from matte red to sheer nude overnight, but the latest look —clear gloss — has got to be the easiest to master. Both Cameron Diaz and Mary-Kate Olsen have been spotted wearing just transparent shine on their pouts. The fave in Hollywood? C.O. Bigelow Mentha lip shine in the green tube ($7.50; bigelowchemists.com). Peppermint oil freshens breath and they just came out with a gloss with a slight hint of pink too.

Iron Maidens
Say so long to kinky stars. Nicole Kidman, Demi Moore, and Beyonce have all been spotted with pin-straight hair. The style begs for more dramatic make-up because the look can be severe, so play up your eyes if you decide to go straight. The Sephora purse-sized cordless straightening iron ($225; sephora.com) will come in handy if you need to flatten your locks on the go.

Purple is the New Black
When it comes to nail color anyway. YSL’s new Black Tulip ($19; yslbeauty.com) and OPI’s Siberian Nights (opi.com) are both vamp-y takes on the midnight hue. Mandy Moore likes a plum onyx blend called Branwen’s Feather by Butter London Free 3 ($12; butterlondon). Keep nails short and square if you try this look or you’ll resemble a corpse.

Photo credits: C.O. Bigelow; Kidman, Getty Images; OPI.com