Both events will also be live-streamed on Facebook.
The "Coke Zero Countdown" event will be held in White River State Park as part of Indy's "The Big Dance," a three-day free music festival timed to coincide with the Final Four tournament.
Coke Zero's pep rally will kick off at 1:45 P.M., ET, followed by entertainment by country music star Darius Rucker, rock band Daughtry, and R&B singer Melanie Fiona.
The live stream of the entire event will be viewable via the brand's Facebook fan page (Facebook.com/cokezero).