Clay Walker makes surprise appearance during Tim McGraw's rodeo performance

HOUSTON, Texas (KTRK) -- A rodeo favorite returned to Houston.

Tim McGraw performed at the Houston Livestock Show and Rodeo Thursday night, and a surprise guest joined him on stage.

Clay Walker made a special appearance on stage in front of more than 66,000 people.

After the concert, Tim tweeted, "Thanks RodeoHouston and thank you to my brother Clay Walker for joining us."

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