First, I made a "body" from fabric and stuffed it.
I added a little "jewelry" to give it pizazz!
Then I dressed the body with her bowling shirt.
And finally, here is how the back of the shirt looks.
I didn't want to stuff the actual shirt, which I would have had to sew and modify. This way if she doesn't like it she can still take her shirt off. Also, if the shirt should get spilled on or dirty, she could undress the "body pillow", wash the shirt, and re-dress the body.