Rascal Flatts will release its fifth album, which is not yet titled, on Sept. 25. They are working with producer Dann Huff on the project for Lyric Street Records. The trio performed for more than 1 million fans in 2006 on their Me and My Gang tour and were the best-selling artist of 2006. The group's next concert is Thursday (March 29) in Milwaukee. Rascal Flatts will also perform the opening song at the CMT Music Awards on April 16 in Nashville.