Katherine Jenkins dazzles as a modern-day Marilyn Monroe

By Daily Mail Reporter

PUBLISHED: 21:30 EST, 22 April 2012 | UPDATED: 21:30 EST, 22 April 2012

As she tries to win over U.S. viewers as a contestant on Americas version of Strictly Come Dancing, it appears Katherine Jenkins is going for some old-fashioned Hollywood glamour.

The opera singer, 31, resembled Marilyn Monroe at a charity ball at the Hilton hotel in Beverly Hills, California, at the weekend.

But she wasnt quite able to match the actresss famous curves, having lost one and a half stone in her training for Dancing With The Stars.

Katherine Jenkins arrives at John Wayne Cancer Institute's 27th Annual Odyssey Ball at The Beverly Hilton Hotel

Marilyn Monroe

Star turn: Opera singer Katherine Jenkins, 31, resembled Marilyn Monroe at a charity ball at the Hilton hotel in Beverly Hills

'I've lost a stone and a half,' she said. 'I'm burning so much energy now that its hard to put the weight back on.

'But I like to be curvy so Im trying not to lose any more. But I do want to be healthy, too - there are so many skimpy costumes to wear. That scares me.'

The singer later shared a picture of big pile of cakes as she told her followers she had been filling up on calorific treats.

In action: Katherine and dance partner Mark Ballas performing the Paso Doble on a recent episode of Dancing With The Stars

In action: ! Katherin e and dance partner Mark Ballas performing the Paso Doble on a recent episode of Dancing With The Stars

In an interview with the MailOnline last year, Jenkins revealed she relied on a combination of jogging and Bikram yoga to stay in shape.

She said: 'Im not naturally a person that wants to exercise, but I find running is something I can do wherever I am in the world. I think Bikram is a really good thing, I think everyone should do it.'

She also follow a relaxed version of the Dukan diet - famously practised by Jennifer Lopez, Gisele Bundchen and the Middleton women.

She explains: 'I do follow a version of the Dukan diet, but I dont follow it to the extreme so a lot of fish and vegetables. If I want chocolate Ill let myself have a bit of chocolate in moderation.'