Because he IS a star!

Winnie the Pooh received a star on the Hollywood Walk of Fame the other day, celebrating the silly old bear's contribution to the world of entertainment, and his 80th birthday. (Here he is posing with both his star and his plaque.) Pooh is, as most of you know, Mom's favorite cartoon character. With his being so honored, she will be happy.
By way of some history, Pooh debuted as a cartoon character in the 1966 Disney featurette Winnie the Pooh and the Honey Tree, and went on to star in dozens of films, specials and several cartoon series.
The bear, created in the 1920s by British author A.A. Milne (who coincidentally, or cosmically, shares my birthday), was joined at the unveiling by his pals Tigger, Eeyore and Rabbit.
Milne named Pooh after a stuffed bear owned by his son Christopher Robin Milne. ("Tut, tut! Smells like rain!")