Tim, who just turned 52 on May 1, was all smiles performing his new song, “Thought About You." The country superstar looked handsome in a black and white designed shirt which he tucked into a pair of light blue denim jeans.
Little Big Town performed their new song, "The Daughters" for one of the first times to the excited crowd.
Lauren, 24, looked trendy on stage in a pair of high-waisted, colorful sequin pants and a black crop top.
The "Doin' Fine" singer took the stage with Tenille Townes and Caylee Hammack for a few songs and ended their set with a throwback cover of Shania Twain's “Man! I Feel Like a Woman."
Music duo Dan + Shay also performed at the festival which donates a portion of its proceeds to St. Jude Children's Research Hospital.
Florida Georgia Line's Tyler Hubbard and Brian Kelley took the stage in matching denim outfits.
Luke Combs, who recently released his new single "Beer Never Broke My Heart," performed for the excited crowd in his usual baseball hat and casual ensemble.
Even radio host Bobby Bones sang a few songs. He wore a bright red Varsity sweater with beige pants and matching red sneakers.
Did you go to the iHeartCountry Festival this year? If so, let us know which performer was your favorite!