Age: 32 Status: Engaged, to longtime girlfriend Aliette Vasquez Profession: Racecar driver (he won the Indy 500 in 2001 and '02), partnered with Julianne Hough Nicknamed Spider-Man (for scaling the track-side debris fence after every race victory), the Brazilian daredevil is getting pulses racing with his show-stopping mambo and good ol' fashioned modesty: "I can hear the audience clapping and cheering and it's fuel for my energy," Castroneves told PEOPLE. "It really keeps me going."