Who's That Girl? is a hilarious romantic comedy novel written by Alexandra Potter. The book centers around Holly, a young woman who finds herself in a series of comical and embarrassing situations after a case of mistaken identity. As Holly tries to set things right and find true love, she embarks on a journey of self-discovery and learns valuable lessons about friendship and following her heart. With its laugh-out-loud moments and heartwarming romance, Who's That Girl? is a perfect choice for fans of lighthearted and feel-good reads.