Leona parties with Kanye West, Rihanna

Leona Lewis has enjoyed an extravagant night out with Kanye West and Rihanna.

The X Factor champion befriended West last month while they were laying down tracks in the same LA recording studio.

The hip-hop star was so impressed with Lewis that he decided to introduce her to his friend Rihanna after his secret gig in London on Monday night.

An insider told DS: "Leona and Rihanna swapped style tips and bonded straight away. Leona congratulated Rihanna on her number one success with 'Umbrella', and Rihanna told Leona that she'd been absolutely blown away by clips of her singing on the net. It was a real love fest."

The musical trio ended the evening at London's exclusive Mahiki nightclub, where they are said to have racked up a £6,000 bar bill.