Travolta got his star around the time of the release of the film Urban Cowboy. John's square is located near John Wayne's and, in case you are wondering, he has MUCH bigger feet than John Wayne. John laughed at this when he was setting his feet in the cement. Wayne, in turn, laughed for the next ten years as John struggled before making a bunch of talking baby films.
Travolta signed his square and wrote "Ted, it's great to be here, Thanks!"
The Ted he is referring to was owner of the theater Ted Mann.