Rihanna steps out with sweat patches and a see-through top

Not a winning combination! Rihanna steps out with sweat patches and a see-through top

She's known for her risque outfits that show off her enviable figure.

But Rihanna was well and truly let down last night when she displayed sweat patches .

As if her black, see-through, midriff-baring top wasn't enough, the 23-year-old singer's perspiration was unmistakable after a hard nigh partying.

Dancing too hard Rihanna was spotted out partying in west Hollywood last night in a tight see-through black top, which showed her sweat patches

Dancing too hard Rihanna was spotted out partying in west Hollywood last night in a tight see-through black top, which showed her sweat patches

The popstar's outfit at the Greystone Manor club in West Hollywood was outdated and mismatched with the top featuring a turtleneck.

She added a tiny black miniskirt, a comoflauge-patterned trucker hat and Louboutin heels to the ensemble.

Her curly hair was hidden beneath the hat and she sported a lashing of bright red lipstick.

Rihanna
eventually covered up her top half in an oversized black leather jacket.

The club is the same venue the star was seen partying at last week when her abusive ex-boyfriend Chris Brown was there.

Not getting it right: The singer paired the top with a tiny black miniskirt, a trucker hat and Louboutin heels

Not getting it right: The singer paired the top with a tiny black miniskirt, a trucker hat and Louboutin heels

The close encounter initially sparked rumours of a possible reunion,
however it later emerged that Brown was accompaied by his new
girlfriend, Karrueche Tran and the two singers were seen leaving the venue separately.

Earlier this month, Chris's
representation was forced to insist that the pair were 'just friends,'
after several insiders said that they would 'meet up very casually' and
that Rihanna 'comes to see Brown anytime she's in L.A.'

'He and Rihanna are just friends,' Chris's rep told ABC News. 'He is with his girlfriend, Karrueche, and is not cheating.'

Speculation that Rihanna had rekindled
her romance with the R&B singer mounted even further following a
series of cryptic messages on Twitter late last month.

Keeping warm: The 23-year-old eventually covered up in an oversized black leather jacket

Keeping warm: The 23-year-old eventually covered up in an oversized black leather jacket

While the pair didn't directly tweet each other, they both wrote declarations of love which appeared to be in response to one another.

The Kiss Kiss star kicked off proceedings with a tweet saying: 'Love U more than u know!'

To which the Barbadian beauty appeared to reply two minutes later, saying: 'I'll always love u #1LOVE.'

The couple, who dated for two years, split in 2009 after Brown violently assaulted the singer, for which he was convicted and sentenced to five years of probation and six months of community service.

In February of that year, the Grammy-winner was scheduled to perform at the Grammy Awards, but had to cancel at the last minute due to the altercation with her then-boyfriend.

A leaked photograph from the Los Angeles Police Department showed Rihanna with a bruised and beaten face, which she later spoke about on US show Good Morning.

Earlier this year, Rihanna relaxed the conditions of a restraining order against Brown.