 An American Idol finalist has been chosen to serve as the Grand Marshal for this year's Yarmouth Clam Festival in Yarmouth, Maine. Julia Gagnon will be involved in tonight's parade, which starts off the very popular event. Gagnon finished in seventh place during this past season of Idol and has been performing around the state. The festival is expected to draw roughly 100,000 people over three days. And more details can be found at clamfestival.com.