Blake Shelton and Miranda Lambert's anniversary is May 14, but knowing what we know now, another date is just as important. In 2005 fans saw a dopey grin on Shelton's face that was much more than one singer admiring another in song. As Lambert sang her portion of 'You're the Reason God Made Oklahoma' during the CMT '100 Greatest Duets' concert, the 'Honey Bee' star fell hard.

Lambert looked adoringly into Shelton's eyes as the two closed in on each other. Finally, at the end, as the crowd erupted as the now-superstar embraced his future wife and both smiled so hard they nearly came off the floor.

“I was a married guy, you know, standing up there going, ‘Man, this shouldn’t be happening,’” Shelton said of the moment during Lambert's 'Behind the Music' special on VH1. “Looking back on that, I was falling in love with her right there onstage.”

Lambert would agree. “We had instant chemistry,” she revealed.

The couple were married during a private ceremony in Boerne, Texas on May 14, 2011. Over 500 guests were in attendance, including Reba McEntireDierks BentleyLady Antebellum‘s Charles Kelley and Martina McBride.

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