Light Up New York by Natalie Grant

Join twins Mia and Maddie and their sidekick little sister, Lulu, as they travel the country finding adventure, mystery, and sometimes mischief along the way. Together with their famous mother, singer Gloria Glimmer, and their slightly wacky nanny Miss Julia, the sisters learn lessons about being good friends, telling the truth, and a whole lot more.

In this fourth book in the Faithgirlz Glimmer Girls series, the Glimmer family is headed to the Big Apple—New York City! Gloria has been asked to perform a concert in Times Square and the whole family joins her. Miss Julia immediately starts planning a sightseeing trip for the sisters that will be better than all the rest, but plans never turn out exactly as they imagine when the Glimmer girls are involved. So what happens when sibling rivalry, random acts of kindness, and a little mystery all meet up at some of the most famous sights in New York City?