Michelle Trachtenberg: I Feel Sexier with Dark Hair!

Credit: Kate Powers

No dye-lemma here: When Michelle Trachtenberg is filming in NYC -- more than 2,000 miles from her L.A.-based hair colorist -- she takes matters into her own hands with John Frieda's Precision Foam Colour.

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"It's foolproof," the Gossip Girl actress, 26, raves to Us Weekly about the solution, which comes in 20 colors.

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Her new favorite shade? Brilliant Brunette Deep Brown-Black ($12.99, ulta.com). "I'm naturally dirty blonde and I've worn a reddish brown for a bit," she says.

Like many blonde-born stars who have traded their sunny strands for darker locks  (Audrina Patridge, Katy Perry, and Leighton Meester to name a few), the star absolutely loves sporting a deeper hue.

"I feel sexier when I'm dark! I love how darker hair brings out my eyes and also complements my pale skin," she tells Us.