Rihanna steps out in her most revealing day look yet... as friends 'urge her to go to rehab to seek help for excessive partying'

She's pictured out drinking and partying on most nights, regardless of where in the world she is.

But now new claims have emerged that Rihanna's friends are so concerned about her welfare due to her 'excessive partying' that they are urging her to check into a rehab centre.

According to reports, Rihanna's manager and close friend Jay-Z has ordered the 24-year-old singer to seek help before it's too late.

The claims about Rihanna's wellbeing came as the singer was pictured stepping out in New York looking tired and dishevelled in possibly her most revealing outfit yet.

Rihanna was pictured wearing a tiny pink lace bandeau bra with a pleated skirt as she headed out and about in Manhattan, covering up with a white cardigan over the top at points during the outing.

She teamed the outfits with a pair of high-top trainers and sunglasses.

Jay-Z hit the roof when he found out, and told Rihanna, "Go to rehab now or I'll drop you from the label". She's not happy, but she now feels she has no choice.'

However, Rihanna denied claims that she had cancelled the UK trip due to illness, insisting she just needed to spend more time with her family, particularly her grandmother Dolly who is suffering from cancer.

Meanwhile, other reports have suggested that Rihanna is suffering from a personality disorder.