Reaching this milestone in just over nine weeks marks the fastest Gold Single certification in Chesney's career. The song is on Chesney's new disc, "Welcome to the Fishbowl.

Written by Shane McAnally, Josh Osborne and Sam Hunt, Chesney said, "Come Over is one of the most emotionally universal songs I've ever recorded. When you break up with someone, you don't break up all at once. You break up over time. And that's the thread of the song. Letting go is hard."

The 'Brothers of the Sun' Tour, with Chesney and Tim McGraw, made an emotional stop at Denver's sold out Sports Authority Field at Mile High Stadium. Chesney took a moment before I Go Back to address Friday's tragedy in Aurora, saying, "Me and my road family are just like the rest of the nation, hurting with this city tonight. We love you, and we're with you, and if you guys will let us, we want to let music start to heal this town just a little bit tonight."

"After last year, three nights in this town, we couldn't wait to get back. We thank you for all the love you give us. God bless you for loving music," he said.

Later in the show, he referenced Denver Broncos Coach John Fox and quarterback Peyton Manning as he introduced Boys of Fall, and they walked on stage to an ovation that was deafening.

Next weekend the tour takes on Lucas Oil Stadium in Indianapolis and Browns Stadium in Cleveland.