There are many interesting back stories on the list of candidates for the new female-only racing class, the W Series, perhaps none are quite like that of Doreen Seidel, though. The 33-year-old German driver made her name as a Playboy model! Seidel posed regularly in the magazine for years and even visited the Playboy Mansion to meet Playboy founder Hugh Hefner. She still races with the Playboy bunny on her helmet and is on the list of 55 candidates to take part in the inaugural W Series in 2019.