Rascal Flatts guitarist Joe Don Rooney and his wife, Tiffany Fallon, are expecting their first child in May, the couple announced Thursday (Dec. 6). "We are so excited to be adding a new life to our home," said Rooney. His wife added, "We cannot wait to become parents and cannot believe that this time next year, we will be celebrating Christmas with a child!" They were married April 23, 2006, in Cabo San Lucas, Mexico. She was Playboy magazine's Playmate of the Year for 2005.