Country singer Easton Corbin and rock-meets-bluegrass quintet Trampled by Turtles will perform on Preakness InfieldFest's second stage on May 16, according to the Maryland Jockey Club. Nashville rock band A Thousand Horses will also perform at the Jagermeister-sponsored stage. The three acts join rapper Childish Gambino and DJ Armin van Buuren as the Preakness InfieldFest's scheduled music acts. Tickets — general admission ($60) and Mug Club package ($80) — for InfieldFest are on sale now. The prices increase by $10 on May 1. For more information, go to preakness.com.