Toby Keith‘s single “Red Solo Cup” has been certified double platinum by the RIAA to signify two million digital downloads. “Red Solo Cup” became Keith’s first platinum single in January and is now the best-selling single of his career. In addition, Luke Bryan‘s 2010 single “Rain Is a Good Thing” and Billy Currington‘s 2007 single “Good Directions” have been certified as platinum for one million digital downloads. Both of those singles reached No. 1 on Billboard‘s country airplay chart.