unstoppable is the sixth studio album by american country music group rascal flatts and their final album to be released with lyric street records. it was released on april 7, 2009 and produced four singles on the us "billboard" hot country songs chart. the album debuted at number one on the "billboard" 200 in the u.s. with 351,000 copies sold, making it the band's fourth consecutive number-one debut on the chart. it topped the 1 million mark on october 31, 2009. as of june 2010, the album had sold over 1,230,638 copies in the united states.