Darius Rucker, best known as the lead singer of Hootie & the Blowfish, has the No. 1 country album and the No. 1 country single in Billboard magazine this week. "Don't Think I Don't Think About It" was the lead single from his first solo album, Learn to Live, which was released by Capitol Nashville on Sept. 16. Rucker replaces last week's No. 1 country album, Jessica Simpson's Come On Over.