'Drink a Beer' singer Luke Bryan is not a shy guy; he confidently shakes it onstage and eagerly crashes people's parties, for crying out loud! But when he met his now wife Caroline, he was anything but bold -- and she had to make the first move!

"He was always a gentleman," his wife tells People. They met when Bryan was a senior at Georgia Southern University and she was a freshman. "We hung out as friends first and he never made a move on me. I kissed him first! He was always so scared of making a girl feel uncomfortable, he wouldn’t cross a line."

After dating on and off for several years, the cute couple married in 2006, and now have two adorable boys. Although a lot has changed since their college years, the country star maintains the same grounded (yet super fun) attitude onstage as well as at home.

Says Caroline, "Everything that Luke has done and been like at home is coming out in public. He’s not fake, he’s not putting on an act. In college, we used to go dancing in a club til 4 a.m., and he’s just as silly at home as he is on stage. He walks around dancing all day, just being goofy."

Even though he's certainly one of country's funniest guys, he's also been one of the most successful in recent years. Bryan leads the Billboard Music Awards nominees with seven nominations in six categories, and is also a finalist for the second-annual Milestone Award, along with fellow country songstress Carrie Underwood.