Lindsay Lohan -- Probation and a Porsche

Lindsay Lohan has a treasure trove of expensive cars at her disposal -- because today she swapped her stroller-unfriendly Maserati for a badass white Porsche Cayman S.

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Lindsay flashed her new whip at the courthouse in Santa Monica where she dutifully met with her probation officer -- and faced questions about Michael Lohan, family photos and "Machete."

Total coincidence those topics came up within seconds of each other.