BRAD PAISLEY made an appearance on the Grand Ole Opry over the weekend and actually forgot the words to the second verse of his hit song "Mud on the Tires." Luckily, fans in the audience were able to shout out the lyrics to Brad so he could get back to singing. One fan caught the funny exchange on camera and posted it on YouTube.

Brad also played lead guitar on the show for country legend BILL ANDERSON. Brad posted a message on Twitter saying, quote, "Gonna charge [Bill] a fortune [for this]." Brad will kick off the 2010 leg of his American Saturday Night tour January 7th in San Antonio, Texas.

(The place in the video where Paisley forgets the lyrics begins just after the 1:30 mark.)