3/27/2008 Kasey Bell Montgomery Gentry has had success in the past, but nothing quite like this. The Country Music duo is celebrating their newest single, “Back When I Knew It All,” which is also their fastest rising single ever. The song (co-written by fellow country artist Trent Willmon), the title track from their upcoming June album, came out four weeks ago, hit the Top 20 at R&R and is continuing to climb. No one is happier right now than Troy Gentry. “Eddie and I are thrilled that our single has gotten such a positive reaction so fast,” Troy said. “We are so fortunate to keep on rockin.’”