MOUNT VERNON, Mo. (AP) _ The tributes continue to pour in for gospel singer ``Dottie'' Rambo, who died Sunday when her tour bus ran off a road in southwest Missouri and struck an embankment. Hank Williams Junior says ``Dottie was one of a kind.'' Amy Grant credits Rambo with introducing her to first husband Gary Chapman. Grant says, ``Maybe it's not too far of a reach to say without Dottie, Gary and I would have never met and created our three beautiful children -- Matt, Millie and Sarah.'' Grant says she last saw Rambo a few years ago holding court during a Fourth of July cookout. She says, ``I loved watching her and Vince `ooh' and `ahh' over each other.''