Jay-Z organized a surprise birthday bash for wife Beyonce Knowles at the weekend.

The rapper made the 'Halo' hitmaker's 29th birthday party on Saturday (9/4/2010) one to remember by hiring out New York eatery The Darby, where the couple were joined by celebrity pals Kayne West, P Diddy, Serena Williams and Alicia Keys.

An insider told the New York Post newspaper: "Jay brought a six-layer cake out for Beyonce, they were really affectionate. Cassidy played Stevie Wonder's 'Happy Birthday'. The party went on until 6 am.

"Both Jay and Beyonce's moms were there, but there was no sign of her father or her sister. Diddy was the last to leave. Jay filled the room with orchids."

Earlier this week, it was claimed Lady Gaga had splashed out thousands of dollars on a custom-made diamond whip and matching underwear set as a birthday gift for the singer, which she presented to her backstage at Jay-Z's concert in Detroit last week.

A source explained: "Gaga wanted to give her something special. The whip was made out of hundreds of diamonds and leather. When Beyonce received it she squealed with excitement."