"Mad Men" star January Jones was spotted at an event in L.A. on Tuesday night sporting one of the hottest trends in Hollywood right now -- not a fancy purse or expensive shoes, but pink streaks in her hair!

The punk-chic look has been turning up on many of your favorite celeb ladies. Teen star Chloe Moretz also rocked the look recently, as did the girl who made pink hair famous in the first place -- P!nk herself!

Click "Launch Gallery" below to see some shots of these famous ladies sporting the tress trend, along with Rachel McAdams, Avril Lavigne and even Oscar winner Julia Roberts!

January Jones pink hair

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