Taylor the Latte Boy is an exceptionally good workout for your voice. While the piano accompaniment is not difficult, the vocal part is what will make you sweat a bit. The narrative style of the song is quite intimate in style, it’s a well-balanced dialogue with the audience and you need to adapt quickly to convey each character smoothly. It’s all about the rightly served emotion!
Enjoyed playing(and singing) the song so much! The Latte Boy really is light and fun, mostly because the entire composition is created in a very playful style, allowing a lot of improvisation in the vocal line and somehow in the melody too. However, despite the lightness it possesses, a perfect performance would demand some exceptional vocal skills and a range wider than average. Kristin Chenoweth did it really beautifully at the Late Late Show... As for the piano part, it's not too technically demanding in my view, intermediate pianists would handle it easily.
This song is so much fun both to learn and to sing!