The Teddy Bear Habit — James Lincoln Collier

Twelve-year-old George Stable wants to be a rock star someday, but he gets horrible stage fright -- unless he has his old teddy bear with him. Hiding the teddy in his guitar seems like a brilliant idea. Then George discovers that someone has hidden stolen jewels in the stuffing of his beloved bear. George's embarrassing “teddy bear habit” becomes the center of a life-and-death chase through Manhattan. Can George survive long enough to make his first TV appearance?