This Looney Tunes t-shirt features an image of Sylvester the Cat singing Christmas carols. The shirt reads Holiday Cheer! Sylvester is no stranger to getting into the holiday spirit. Along with Tweety Bird, Sylvester has appeared in more Christmas specials than any other Looney Tunes character. Sylvester has appeared in Gift Wrapped, Bugs Bunny's Looney Christmas Tales, Christmas In July, Bah Humduck! A Looney Tunes Christmas, A Christmas Carol, It Happened One Night Before Christmas, and Feather Christmas.