What happens at the end of the book big mouth and ugly girl?
The book runs till chapter 48. In this chapter Matt is becoming famous and getting invited to many parties. He appears to be trying to please Ursula so that she accompanies him to these parties. They later on go for a picnic and end up kissing. For further details, check http://en.wikipedia.org/wiki/Big_Mouth_%26_Ugly_Girl#Forty-eighth_chapter.
Read the last couple chapters of the book and find out :-)
One of them got swallowed.... But I forgot who...