Well, sorry if I have to compare this to Idina Menzel's live performance in the oscar's, but it is better than Idina's. There are still flaws in Sarah's performance, but she delivered it very well. She just cannot hit the lowest notes of the song, but other than that, it's superb!
And to those who are comparing it to regine v's performance, back-off. Regine's performance is very much overrated, and too much. It's incomparable.