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Tim McGraw says one of his highlights of 2013 was his Academy of Country Music Awards performance.  He teamed up with Taylor Swift and Keith Urban to perform their collaborative hit "Highway Don't Care" at the April event. 

Tim tells "CMT Top 20 Countdown" it's always special to work with other stars, because "there's only so many times you get to do that in your career."  He adds that he believes he, Taylor and Keith turned in a great performance. 

But McGraw isn't just mulling over the past.  He's working on his next album, and already looking ahead to his 2014 tour.  The singer says he really enjoys "building a new stage," which is difficult but fun.  Tim explains that at this point in his career it's "a big challenge" to "come up with something different," and it's "always exciting" to put together a new show. 

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