Lady Gaga races with Mario Andretti at this year's Indy 500.

Wearing gray romper and a sky-high heels, Lady Gaga visits Indianapolis Motor Speedway in Speedway, Indiana today to join one of the most successful Americans in the history of car racing sport, Mario Andretti in a race at this year's Indianapolis 500.

 

Andretti, the 1969 Indianapolis 500 champion, confirmed Gaga’s participation at the event's celebrity red carpet. "I have yet to meet her, personally. She decided to do it, and all of a sudden here we are." He even joked that he's scared he can't focus in the race with Gaga in the passenger seat, saying, "She’s going to distract me quite a bit, actually. I hope I can just look ahead while I’m driving."

 

Mario Andretti is one of only two drivers to win races in Formula One, IndyCar, World Sportscar Championship and NASCAR. Check out some HQ photos of Gaga and Andretti below plus the video of their racing moment.