Every bride wants to look her best on her wedding day and superstar Mariah Carey is no different.

It will be the third time Mariah has walked down the aisle, and now aged 46 she is on a tight regime to make sure she wows at her lavish wedding, set to take place in August off the coast of Australia.

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The singer is said to be on a strict diet, as she plans to shed an impressive 20 pounds before she ties the knot with Australian billionaire, James Packer.

Carey and Packer met in June 2015 before James proposed in January this year in New York with a 35-carat diamond ring after their whirlwind romance.

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Mariah hates dieting because she loves to eat – the singer enjoys making gluten-free lasagna and pecan pie. But a friend reveals: ‘She has to be very disciplined because she wants to take James’ breath away when he sees her for the first time in her wedding gown.’

For the diet Mariah Carey has chosen she is eating only protein,‘She wants to have an hour-glass figure so she can have a very-tight, sexy, figure-hugging gown,’ a friend says.

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The Heartbreaker singer has ditched pasta, chocolate cake and white wine in order to drop the desired 20 pounds by August. The singer now begins her day at 11am with a smoothie or protein shake, and then eats five small portions throughout the day. This can include four ounces of grilled chicken, lean beef, Broiled Chilean Sea Bass or grilled shrimp with asparagus. The superstar is also eating some of her favourites like baked salmon, chicken salad and sushi.

Mariah also likes to snack on Brie with low fat crackers and treat herself to one glass of red wine with dinner – who wants to give up wine anyway?!

The mum-of-two is rumoured to have started picking out the materials for her wedding gown and has met with several designers. One of the proposed designs has hundreds of gold butterflies, all sewn with 14-karat gold thread, flowing down the back of the silk gown and through the train.

A family friend reveals: ‘Mariah says this will be her last marriage, that the third time is a charm, so she is determined to be the most beautiful bride the world has ever seen.’