Star Tracks

McConaughey tools around Sherman Oaks, Calif., in his big rig. Plus: Heidi Klum, Lauren Conrad, Madonna and more

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GUITAR HEROINE

Meanwhile, Mischa Barton, who enjoyed a little snowball fight in Sundance, channels her inner rock star during a visit to Fred Segal at The Lift in Park City on Tuesday. The actress is making the rounds to promote her new film Assassination of a High School President.

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