LOS ANGELES, Calif. -- Rascal Flatts' sixth studio album, "Unstoppable," certainly lives up to its name. It's a fitting word for these country boys. They certainly seem to be an 'unstoppable' force in country music, putting out album after album of remarkable tunes. They can harmonize, they can play, they can write, they can rock...and they're not bad to look at. In the music world, that's a perfect combination.