This is the first single from the actress singer thing since her much-publicised 'problems' earlier this year, and was recorded just before she checked into rehab.
The song's produced by Toby Gad, the man responsible for such 2AM blubathons as 'If I Were a Boy' and 'Big Girls Don't Cry'. 'Skyscraper' is, similarly, a bit of an emotional number.
Celebrities on Twitter were quick to commend Demi on her achievement, as she helpfully retweeted for all to see. Pete Wentz commented that it was "amazing when people put themselves into their art completely", and Kelly Clarkson noted that it was a "cool song".