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Lenny Kravitz is a true rock star, but still shows he has a soft side.

While spending some down time in Miami, the musician goes on with his badass self as he jumps on his roaring black beauty which has "Let Love Rule" -- the title of one of his most popular singles -- painted on the side of the tank.

It's hard to believe the rocker is 46-years-old -- he still wears some rather fashionably-provocative get-ups. You can see more of Lenny in his hot to trot outfit after the jump!