Its nonstop laughs when Pinkalicious finds a knock-knock joke book in the school library. But when one of the mean girls challenges her to a laugh-off, Pinkalicious has to pull out all the stops to create the funniest, most pinktastic joke ever. Full color. n nWhen Tiffany challenges Pinkalicious to a laugh-off, the pressure is on to create the most pinkerrifically funny joke of all time. n nEven if Pinkalicious doesnt win the contest, shes going to have a lot of fun trying n