Leonardo DiCaprio helps Rihanna to throw 27th birthday party?

Los Angeles: Superstar Leonardo DiCaprio has reportedly helped throw R&B star Rihanna a star-studded affair for her 27th birthday.

The bash took place at a private home in Beverly Hills and went past 4 AM in the morning, reported Us magazine.

"There were balloons that spelled out her name set up," a source said.

The 'FourFiveSeconds' hitmaker dressed in a plunging dress and kept her dark locks down and slicked back.

Rihanna was surprised to see a leopard print three-tier cake.

Celebrities Naomi Campbell, Mick Jagger, Beyonce, Jay Z, Russell Simmons, model Angela Martini, Tommy Chiabra, and Richie Akiva were present at the occasion.