Country trio Rascal Flatts pulled the plug on their Houston Livestock Show concert in Texas last night (14MAR07) to allow singer GARY LeVOX to recover from a bout of bronchitis. The frontman fell ill over the weekend (10-11MAR07)and failed to recover in time for the show. Rascal Flatts were replaced at the rodeo show by CLAY WALKER, Jack Ingram and JOE NICHOLS, who recently performed at Anna Nicole Smith's Bahamian funeral.