Rascal Flatts bassist and vocalist Jay DeMarcus and his wife Allison, a former Miss Tennessee and a current CMT personality, welcomed their second child yesterday, son Dylan Jay DeMarcus. Dylan was born in Nashville, Tenn., at 4:02pm, weighing in at 7 pounds and 11 ounces at 20 1⁄2 inches long. Mom and baby are doing fine and will be home soon. Dylan joins sister Madeline Leigh who was born December 17, 2010.  Jay returned to the stage in Detroit on Friday night after making the trip to Nashville for Dylan’s birth and back in time to be on stage— still wearing his scrubs!