Rihanna flashes flesh and shows her thigh muscles on American Idol 2012 finale performance

LA: The You Da One singer revealed her super-toned figure in a black fringed bra and black hotpants with attached drapes. And her muscles rippled as she pulled some dance moves in her performance of Where have You Been on the show’s Grand Finale.

According to the Sun.co.uk report, the 24-year old, sporting black dreadlock hair extensions, made a dramatic entrance in a green neon triangle.

Surrounded by dancers in tribal make-up she pulled an energetic routine as an topless drummers pounded on the side of the stage.

Fitness guru Harley Pasternak recently revealed: “Rihanna looks amazing right now. I have put her on a special 25-minute-a-day workout that consists of five mini workouts.

“She does it five days a week, wherever she is in the world.”

But another trainer said the dedicated star is even prone to working out in the early hours of the morning.

Ary Nunez said: “We train when she's ready. Even if we're on the road and it's 2 am in the morning, I'm on call 24X7 with her." Harley also revealed that she keeps slim with a healthy eating plan – apart from one day a week when she can pig out on whatever likes.

He said: "She eats five small meals and snacks a day. These are made up of healthy carbohydrates like vegetables and fruit, healthy fats, like nuts or avocado, low-fat protein, whole grains and sugar-free drink like green tea.”

The diet and exercise regime is certainly paying off – the singer’s body is more toned than ever.