Jeff Koons isn't just the artist behind BMW's latest art car — he's also created some seriously erotic artwork. Take this piece, depicting his porn-star ex-wife, titled "Dirty Jeff on Top." Is this the kind of artist BMW wants? (NSFW)

Alexander Calder, 1975 3.0 CSL.

The 17th BMW Art Car, designed by artist Jeff Koons, will race at this year's 24 Hours of Le Mans, giving race-goers the first opportunity to witness the BMW M3 GTR rolling rainbowgasm up close.

BMW's art cars: the most famous rolling sculptures of all time. For a limited time the LACMA is exhibiting four of the cars, designed by Roy Lichtenstein, Robert Rauschenberg, Frank Stella and Andy Warhol.