Ariana Grande continued her consistent streak of great live performances this year at the 2013 Rockefeller Center Tree Lighting Ceremony.
Singing original song Love is Everything, and a cover of Last Christmas, the pint-sized singer didn't miss a note, bringing effortless vocals despite the cold conditions. There was also a noticeable and appreciated change in her delivery style- being less overtly showy (in range and melisma) than usual. I'm not sure what else to add other than she was great and looked as cute as a button!
[Excuse the "watercolour" recording of Last Christmas, I couldn't find a better copy. You should still be able to hear Ariana's vocal under the person's voice]