Bye bye birdie audition help?

I'm trying out for bye bye birdie soon and need to sing a song from the show. I have a range of three octaves so i can pretty much handle any female role in the show. However, i was told by the director that i have the look and sound of a sweet apple teenager, so I'm going for Kim MacAfee. However, i'm confused about what to sing. I'm between "How Lovely To Be a Woman" "One Boy" Kim's section of "Got a lot of Livin' to do" (probably to short, though) and "Bye Bye Birdie finale." Anybody have advice?