Shrinking Violet is totally famous - Lou Kuenzler

The third book in this hilarious new series - with lovely illustrations
throughout.
Violet loves the milkshakes at Udderly Perfect, the coolest cafe
around. But Udderly Perfect is threatened with closure, all because
of a mistake Violet made. She must find a way to keep it open.
Perhaps she can persuade her favourite celebrity stunt woman, Stella
Lightfoot, to join the campaign when she comes to town on a book
tour?
But when Violet shrinks and ends up in Stella's luggage on location,
she finds out that her idol is not who she thinks she is. Shrunken
Violet might just be the only one who can save Stella's reputation
... and in turn, Stella might be willing to help save Udderly
Perfect, too.