The 23-year-old asked British artist Claire Milner to make the 5sq ft picture of the Hollywood legend and spent thousands more having it shipped to her luxury Beverly Hills mansion, reported Sun Online.

The portrait constantly changes colour, sending rainbows of light round the room.

Claire says she spent four months finishing the shimmering picture -- which weighs a hefty 13 stone -- placing each of the crystals by hand at her Yorkshire studio.

"I tried to show the glitter of the public life and then the sadness in Marilyn's eyes. Because of who Rihanna is, everything had to be done through her interior decorators. But they told me afterwards that she loved it," said Claire, who has done similar portraits of David Beckham and Elvis Presley.