Beyonce helped her man Jay Z celebrate his 40th birthday in the Dominican Republic with a 50s gangster style birthday bash last night. She was the guest of honor along with Jigga’s mom Gloria.

According to Marie Claire.CO.UK, his well-heeled guests included Oprah Winfrey, Mary J Blige, Alicia Keys, P Diddy, Kate Hudson, Ne-Yo, M.I.A., Kanye West and Lil Wayne. Sean Combs and Kanye performed during dinner and actress Gwyneth Paltrow and rocker Chris Martin of Colplay sent birthday greetings via video.

After dinner, guests were treated to a 40s-style synchronized swimming show followed by a fireworks display.

The only guest missing from the merry shindig was golfer Tiger Woods who has his own problems to deal with.

Guests dined on caviar washed down with expensive Perignon champagne.

There are no pics yet because even the biggest stars were asked to leave their cell phones at the door to prevent them from Twittering pics to Jay Z’s fans who helped make him what he is today.