Jenny From The Block turns the Big 4-0 this Friday, and the singer-actress will celebrate her 40th birthday with a spectacular bash in her hometown of New York City tomorrow night.

WENN is reporting that a number of A-list stars, including Tom Cruise, Katie Holmes, and Victoria Beckham, are expected to descend on the Big Apple for Jennifer’s top secret bash.

Jennifer’s birthday party is expected to include live performances from vocalists and dancers.

“Everything is being kept top secret. Even performers won’t be told if they have been hired until the last minute, to prevent details of the party from being leaked,” said a source.