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The designer is known for her subtle ombré look — a dark blonde at the roots that gradually fades into bleached-out tips — while the daring pop star recently tried a more shocking two-toned route: platinum strands with vibrant reddish-pink tips.
And while these aren’t new hair color trends, they show no signs of dying. Britney Spears and Avril Lavigne have recently sported dip-dyed tips similar to Aguilera, and Lea Michele has a brunette version of Conrad’s look.
So we want to know: Which hairstyle do you prefer? A head-turning two-toned look à la Aguilera or a single-hued ombré style like Conrad? Vote in our poll below and leave your thoughts in the comments; your feedback could appear in an upcoming issue of PEOPLE!