Watch Miley signing her book
Miley Cyrus has been out signing copies of her new book for fans in New York.
Loads of children and adults packed the bookshop for a chance to meet their hero. Some people queued up for more than 12 hours!
It's the first book she's written and is called Miles To Go. It's about Miley's road to becoming a superstar.
The star of the TV show Hannah Montana has also had a number one film and three best-selling albums. Miley will be hoping the book will be a hit too!