And apparently her no show at a rehearsal for her Saturday Night Live performance last week, where she angered producers by sending her choreographer to stand in for her instead, was also down to her suffering from exhaustion and the flu.
After her short stay in hospital, doctors apparently allowed the star to fly back home to LA, which would explain the other picture she tweeted yesterday of her boarding a private jet.
She's obviously feeling a bit bored lying in her sick bed too as she's been uploading old pictures to Twitter - at least we hope they're old given that in the latest snap she's got a drink in her hand.
Friends have been worried about the star's recent behaviour, saying that she has become "out of control".
One told American Star magazine: "Rihanna loves to party but this past month she's gotten really out of control. She's been drinking almost everyday and talking about smoking weed a lot too."
> IN PICS: RIHANNA'S HOLIDAY ALBUM
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Yesterday we got ever so worried about Rihanna when she tweeted a picture of herself hooked up to an IV drip, especially as she gave no more details about what was wrong with her.
However, it h...
Yesterday we got ever so worried about Rihanna when she tweeted a picture of herself hooked up to an IV drip, especially as she gave no more details about what was wrong with her.
However, it h...
I guess she's just feeling a little ignored and needed some extra attention. If she can tweet a picture of her arm and IV, she's not feeling that badly.
Rallen99: I guess she's just feeling a little ignored and needed
...and what if us mere mortals were suffering with exhaustion, we'd have to get on with it that's what, not flown home in a private. I find it very hard to feel sympathy for this woman, she's brought it all on herself. Another thing, she took up a hospital bed that might have been needed by a genuinely ill person. Off my soapbox now ;)
Marina18: ...and what if us mere mortals were suffering with exhaustion,
not another amy winehouse please.
Slow down girl. No more white outs (A white out is where you are in a concious faint or coma usually brought on by mild drug use combined with alcohol.)
greencardclose: not another amy winehouse please. Slow down girl. No more
She's always hooking up to drips...Who is really interested? I'm never going to meet her, I don't know any of her family, I don't understand her songs. i only read because...I can't explain why I read it or why I'm here...I need a doctor and a drip...
henvectra: She's always hooking up to drips...Who is really interested? I'm
Time to be seen with sick, dying, infected, poverty striken children, or even mention that thinking of Diana / Nelson Mandela / Aunt - Mum- Grand with cancer, has pulled her through.
Does she model herself on an amoeba?
Markp2k: Time to be seen with sick, dying, infected, poverty striken
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The Huffington Post UK | By Ashley Percival | Posted: 10/05/2012 09:46 Updated: 10/05/2012 12:25