The Twin Falls county fair is underway at the fairgrounds in filer. The theme this year..Carnival Lights and western nights. Keeping with the western theme there are plenty of country things going on. Traditional events such as the famous PRCA Rodeo, Inland Empire/ Royal West midway, 4-H competition, Destruction Derby.  This year's musical headliners..country sensations Joey and Rory and The Band Perry.  Fair manager John Pitz says there is plenty of new things happening at the fair this year as well.  One of the most talked about aspects of the fair this year is the addition of the beer garden.  Pitz says the county worked hard to have the potential extra money maker without compromising the safety and fun of all fair goers.  The PRC rodeo opens tonight and runs through Saturday night.  Joey and Rory and The Band Perry play Sunday night and the ever popular demolition derby takes place on Monday night.  The fair runs through Monday September 5th.