It's the Monaco Grand Prix this weekend, which means all the teams do something a little special. Lotus has Daft Punk on their side pods. But Sebastian Vettel wins, because his helmet reveals a (mostly) naked woman as it gets warmer.

Vettel's helmet is meant as a tribute to Monaco Grands Prix past, with moments from some of the greatest races that the event has ever seen on top of his lid.

But around back is a pinup girl in a dainty black swimsuit. That's kind of risque, but still pretty normal for F1, especially for Monaco. What makes it change is the use of heat activated paint.

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When it gets warm, her black outfit disappears to reveal her body, as well as two stars where her, ahem, 'lady buttons' would show. His over-the-shoulder on-board camera should be a hoot to watch Sunday morning.

And in other, less exciting custom Monaco helmet news, Lewis Hamilton painted Nicole Scherzinger and his dog Roscoe on the back of his helmet.

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I think Vettel wins this battle.