We've mentioned on air before the link between Lady A and Luke Bryan, well for the fifth straight week, Lady Antebellum continues to hold the top spot on the Billboard Country Singles chart with "Need You Now." The feat makes the song the longest-running #1 of 2009. Meanwhile, the trio has even more to celebrate. Charles Kelley and Dave Haywood co-wrote Luke Bryan's first chart-topper, "Do I," which lands at #1 on the Mediabase chart, and Hillary Scott sang on the tune!

Luke recalls that when he turned in "Do I" to his record label as his first single from his second album, the staff was buzzing about how special they thought the song was. In fact, he says they predicted big things it: "To have so much label support behind me on this song... To see that we were all right and that everybody knew what we were talking about when... 'Cause you know it was a little scary to sing your ballad as your first single on your second album. But we all trusted each other's instincts and we went with it and it's working out real well for us."