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Rihanna's crazy body clock

Rihanna's crazy body clock

Rihanna's body clock is a "total mess".

The 'FourFiveSeconds' hitmaker regularly works long days in the studio and it has left her sleeping pattern all over the place.

A source shared: "Her body clock is a total mess from working 18 hours a day in the studio."

To refuel herself after a lack of sleep, an insider claims the 27-year-old beauty loves to enjoy her favourite fizzy drinks and beer.

They added to US' OK! magazine: "She fills up by drinking a crate of Diet Coke - washed down with Budweiser! (She) simply forgets to eat.

"She calls the combo 'rocket fuel' and while she enjoys the odd shot of tequila or vodka on the rocks when out partying, in her opinion, nothing can beat her beer and fizzy soda mix."

Meanwhile, the 'Diamonds' singer recently admitted she hates vegetables and prefers to enjoy helpings of pasta and cheese.

She said: "I eat tons of mac and cheese. I know I shouldn't but I do. I've had some time off from keeping fit but I'm really get back into working out now and eating cleaner.

"I hate vegetables but I'm learning how to incorporate them one by one into my diet and drown them with other flavours so I don't have to taste them. I'm starting an album so it's time to get fit, get right."