Billionaire Russian oligarch spends £3.5MILLION hiring Sir Elton John and Mariah Carey for his 19-ye

· Irene Kogan, granddaughter of Valery Kogan, married Daniel Kevey at the £1,450-a-night Landmark Hotel

· Mariah Carey was 'paid £2.5million' to fly from US and dedicated her song We Belong Together to the couple

· Sir Elton John, who never performs for less than £1million, did a 12-song set and dedicated Tiny Dancer to her

· Mark Ronson did a DJ set and actor Antonio Banderas gave speech at the star-studded occasion on Saturday

Elton John, who does not play for less than £1million, opened the bill with a 12-song set at the incredibly lavish wedding

Irene Kogan, the granddaughter of Russian-Jewish oligarch Valery Kogan, married Daniel Kevey at the London's Landmark Hotel, where the best suites cost £1,450-a-night, on Saturday. Mariah Carey was reportedly paid £2.5million to fly over from the US and sing to the couple. She dedicated her classic ballad We Belong Together to them and even invited Irene to join her on the stage (pictured, main), the bride dancing with the singer on the stage at the star-studded ceremony. Sir Elton John (top right), who rarely performs for less than £1million, also did a 12-song set, dedicating Tiny Dancer the bride, who wept on her husband's shoulder. Other famous guests included actor Antonio Bande¬¬ras (bottom right), who gave a speech wishing the couple well, and producer Mark Ronson (top left), who did a DJ set to finish of the night. There were performances from numerous Russian stars who are little known in the UK but have sold millions of records in Russia. The happy couple were seen cutting a cake that stood at least ten foot off the ground (bottom left). The lavish ceremony is said to have been paid for by the bride's grandfather, Valery, who owns Moscow's biggest airport and has a vast property profile in Israel.

Sir Elton John and Mariah Carey (pictured) were paid millions to sing at a Russian oligarch's 19-year-old granddaughter's wedding

As Mariah stretched her vocal cords, the bride stretched her legs and danced with her on stage at the incredibly lavish wedding

Irene Kogan continues to dance with the singer during the set at London's Landmark Hotel

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