FILE -- In an April 18, 2010 file photo John Rich arrives at the 45th Annual Academy of Country Music Awards in Las Vegas. Country singer John Rich went all the way on "The Celebrity Apprentice," claiming victory and $250,000 for charity Sunday May 22, 2011. (AP Photo/Dan Steinberg/file)

(CBS) Country singer John Rich was reportedly booted from a Southwest flight Sunday after crew members determined the "Big & Rich" singer was too drunk to make the trip from Las Vegas to Nashville.

Passengers aboard the plane told TMZ that Rich appeared to be drunk as he was boarding the 10:50 a.m. flight.

The singer also reportedly was involved in a verbal argument before he even boarded the Nashville-bound plane and his disruptive behavior continued when he boarded, reports TMZ.

A Southwest airline representative confirmed that a passenger was kicked off of the flight, but wouldn't give a name, reports TMZ.

"Our crew assessed the situation and determined that the passenger was not fit for travel under governing federal aviation regulations," said the statement. "The customer was rebooked on a later Southwest flight out of Las Vegas, but chose to make alternative travel arrangements. We have processed a refund for the customer and his travel companion."