Adele poses on arrival at the 2011 MTV Video Music Awards in Los Angeles August 28, 2011. REUTERS/Danny Moloshok

Adele, the Grammy-award winning star who boasts the two best-selling albums of the year with 2008's 19 and 2011's 21, has been ordered by doctors to take an extended vocal rest and thus cancel her already rescheduled U.S. tour.

This is the third time the chart-topping sensation has postponed a tour.

The Rolling in the Deep and Someone Like You singer canceled U.S. shows in May due to laryngitis and UK shows in September because of a chest infection.

Adele claims that she never got the chance to fully rest and recover.

Guys, im heartbroken and worried to tell you that yet again im experiencing problems with my voice. its ridiculous i know! i cant believe it myself. i follow all the advice im given and stick to regimes, rules and practices to the best of my ability but it seems to simply not be enough (sic), Adele says on her blog.

Adele goes on to describe her troubles with her voice over the past year. She describes being diagnosed with a hemorrhage, which she likens to a black eye on the vocal chord (sic).

The vocal cords are small folds in the windpipe that vibrate to create sound. They receive nutrients from small blood vessels, which can rupture and leak when strained.

Like a black eye, the bruise can heal, but reoccurring damage can cause scar tissue to build up that would cause a permanent change, altering Adele's voice forever.

Anyone can suffer from a vocal cord hemorrhage, but singers are more likely to notice the effects.

Adele slowly recovered from her hemorrhage and returned to her commitments like the iTunes festival in London, the rescheduled U.S. shows, and the VMAS. However, when she began preparing for her UK tour in September, she came down with an unrelated respiratory and chest infection. Then, just before she was scheduled to come to the U.S., she got a hemorrhage again.

ive been offered the chance to not tour at all to save anything like this from happening again, but i simply hate letting you down (sic), Adele laments on her blog. although now im having to let you down once again through no fault of my own really. if i continue to pick up everything before i have properly conquered these problems and nipped them in the bud. i will be totally and utterly f***ed. singing is literally my life, its my hobbie, my love, my freedom and now my job. I have absolutely no choice but to recuperate properly and fully, or i risk damaging my voice forever (sic).

Adele says she is very frustrated and has begun vocal rehab to build up her overall stamina in her voice, body and mind - but she promises to be back.

im gonna smash the ball out the park once im touring again (sic), she says.

Adele's fans seem more than okay with her decision.

Hope it sorts out for you!! We want nothing more than for your voice to get better, what are we going to do if we don't get more songs? ;P Holly Bishop replied on Adele's blog.

However some fans raised issues with Adele's announcement, citing the fact that Adele is rumored to still smoke cigarettes.

SeeHowWell tweets Adele discusses her vocal problems though I might take issue with 'through no fault of my own.'

Mr Jerffrey, who has trained with singers at the National Theatre in London and trains up-and-coming pop stars, told the BBC that smoking is not necessarily an issue.

Some of my friends are the best singers in the world and they smoke and drink, he says.

It certainly doesn't help, but I've also known people who don't drink and don't smoke and still have voice problems.

Adele was scheduled to play a 10 city tour from Atlantic City, NJ to Grand Prairie, TX from Oct. 7 to Oct. 21.

Here's a complete list of the tour dates that were cancelled:

07 Oct 2011 - Atlantic City, NJ - Cancelled

08 Oct 2011 - Durham, NC - Cancelled

10 Oct 2011 - Nashville, TN - Cancelled

11 Oct 2011 - Asheville, NC - Cancelled

13 Oct 2011 - Orlando, FL - Cancelled

14 Oct 2011 - Miami, FL - Cancelled

16 Oct 2011 - Atlanta, GA - Cancelled

18 Oct 2011 - Spring, TX - Cancelled

19 Oct 2011 - Austin, TX - Cancelled

21 Oct 2011 - Grand Prairie, TX - Cancelled