Former Rascal Flatts bassist Jay DeMarcus is still reeling ... "In a lot of ways, I feel like I'm still mourning the loss of the Flatts, even though there wasn't an official breakup.

Their first two albums, 2000's Rascal Flatts and 2002's Melt, have been certified 2× Multi-Platinum and 3× Multi-Platinum, respectively, in the United States, while 2004's Feels Like Today ...