Indianapolis, Indiana - Fans of INDYCAR are being challenged to predict #WhosGonnaWin the 98th Running of the Indianapolis 500 Mile Race through an interactive social media campaign sponsored by Verizon.

Through Twitter and www.WhosGonnaWin.com, fans are invited to cast their vote by using the hashtag #WhosGonnaWin with the name of the driver they believe will take home the checkered flag in the Greatest Spectacle in Racing.

One fan who correctly predicts Sunday's winner will be randomly selected to receive a visit from the 2014 Indy 500 Champion accompanied by the Borg-Warner trophy and a show car. Additional prizes will also be given to the contest winner. Other fans who correctly guess the race winner will be randomly selected and awarded prizes, and the driver earning the most fan votes will have $33,000 donated to his or her charity of choice.

To help spread the word, a truck wrapped in #WhosGonnaWin livery will be stopping at various locations around Indianapolis-including the Indianapolis Motor Speedway, downtown Indianapolis and surrounding areas-starting Friday morning and running through noon on Sunday. The truck will promote the campaign, encourage race fans to vote through social media and project a digital leaderboard. Fans who vote at the truck will also have a chance to win tickets to Sunday's Indy 500.

Voting for #WhosGonnaWin begins Friday, May 23 and ends when the command to start engines is given on Sunday, May 25.

A full list of rules and regulations are available at www.WhosGonnaWin.com.

Support the Canadians in this year's field, James Hinchcliffe (starting 2nd) Alex Tagliani (starting 24th) and Jacques Villeneuve (starting 27th)