Phones banned at J-Lo birthday bash

Madonna was among celebrity guests who had their phones confiscated at Jennifer Lopez's 40th birthday party.

The singer and other guests, including Rihanna, Beyonce Knowles, Alicia Keys and Mary J Blige, were forced to hand over their mobile phones and any cameras before they were allowed into New York's Hotel Griffou to celebrate with Jennifer last Friday.

The strict rules angered some partygoers, but Madonna and Rihanna reportedly used the increased privacy to dance "exuberantly" to Rob Base and DJ EZ's hit 'It Takes Two'.

Lopez spent most of her landmark birthday working on the set of her upcoming film 'The Back-Up Plan'.

When shooting wrapped for the day, the cast and crew presented her with a cake and flowers before husband Marc Anthony arrived to whisk her away to the surprise party.

Lopez looked stunning in a slinky silver dress as she posed for photos outside the event, and Anthony couldn't keep his hands off his wife.

The Latin singer and Jennifer have 17-month-old twins Max and Emme together.