Luke Bryan, Lady AntebellumLuke Bryan is a happy man this week. After three weeks at No. 2 on the country chart, Lady Antebellum's 'Need You Now' has slipped a notch, making room for Luke to claim the top spot with 'Do I.' Ironically enough, Lady A's Charles Kelley and Dave Haywood are co-writers of 'Do I.' The song was written last fall at Luke's house.

"It was really fun," Luke tells The Boot. "It was our first time writing together, and we all just really worked well together. They took 'Do I' and what I'd worked on with it and completely hit it out of the park. We really complemented each other. We worked at trying to write the best song, and nobody was trying to outdo the other. It was something that came together real nicely for us."

Luke says he learned a lot from both of the guys, who, along with bandmate Hillary Scott, took home the CMA Vocal Group Award this year. "I loved watching Dave's musical ability and where he can take a song musically. And watching Charles ... humming a melody and being the great singer that he is. He's able to just really take a song and expand on it a lot because he's just crafty in that way. You see, after writing with them, why Lady Antebellum has been so successful. They're great writers with great instincts."

Both Luke and Lady A are set to hit the road on high-profile tours for 2010. Luke hits the road with Jason Aldean on his 'Wide Open' tour in January, and Lady A joins Tim McGraw on his Southern Voice tour kicking off in February.