The two singers hosted the ultimate concert Saturday when Chesney's The Big Revival tour and Aldean's Burn It Down tour intersected at the Rose Bowl Stadium, making it the first major country music show in the legendary venue's history.
"You know when you wake up and you see that sign, you're on hallowed ground," Chesney said in a press release. "I've seen so many games played there, so much history – and I understand the heart it took from every athlete who's ever come out of those tunnels. To stand on that stage, I knew I wanted to try to honor all those folks who've come before us."
Reese Witherspoon, Vince Vaughn, Ashton Kutcher and Mila Kunis were also spotted in the crowd at the momentous event. Witherspoon even posted a photo on Instagram alongside Chesney with the caption: "What Southern girls do on Saturday night! Gettin' country with Kenny Chesney."
Chesney, 47, performed a stacked set list and played four more songs with Aldean, 38, during his time onstage, including John Mellencamp's "Hurt So Good."
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"Those folks had had a long day in all that heat, but man, they were so ready for us … ready to hear the music, to sing along, to make every single song matter," Chesney said. "They made a memory that will last a lifetime. To play a place where football means so much, especially to an audience that live, I'll never forget it."
Earlier this month, PEOPLE exclusively debuted Chesney's latest video "Save It for a Rainy Day." The No Shoes Nation leader says the song is a "wake-up call," adding "you can decide you're not going to surrender to feeling bad."