Billy Currington's "Must Be Doin' Somethin' Right" has reached No. 1 on Billboard's country airplay chart -- the first time he's hit the top spot. "I couldn't think of a better way to end such an awesome year," he said. Currington will tour with Brad Paisley in early 2006. His other hits include "Walk a Little Straighter," "I Got a Feelin'" and a duet with Shania Twain, "Party for Two."