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We love Miley Cyrus, but this is NOT her best look! Maybe this is for an edgy photo shoot? Here's to hoping...

The pop star, who will be celebrating her 21st birthday this weekend, ran into Miranda Kerr last night in Los Angeles after the model worked the red carpet at a Jaguar event. The ladies posted for a sweet photo together, and that wasn't the only celeb Miles rubbed shoulders with! Lily Allen uploaded the above shot and wrote, "Miley and me x x."

Lily has been a big fan of Miley for years, and she recently told the Observer, "Miley's a b****, rising. She's my hero." Wonder if they're ever gonna do a duet together?

But back to Miley's eyebrows ... what's the explanation for this?! Various websites reported that she posted a pic of her eyebrows back to their darker shade after these photos were taken on Monday night, but the shots of her brows au naturel were actually posted around 1am on Monday morning. Details, details...