When Susie is chosen to perform in the Gracy's Day parade the kids hit the road with their mom's to get to New York. Meanwhile, while on the trip Phil and Chuckie search for a girl to kiss Chuckie. Also, Lil attempts to break a world record by playing "Keep it up" with a soccer ball, across America.

As Phil and Lil's birthday nears, the twins realize that they are more different than they think. Phil is getting to like girls, and Lil is wearing a training bra. Realizing this, they decide to have separate parties for the boys and the girls as they try to out-prank each other.