Gotta say, for a tier 3 this really did catch me by surprise! "My Body" focuses on a bouncy beat, and plenty of alt-strumming, focusing heavily on switching between single notes and 2/3 note chords.
You'll mainly be playing 2 parts. The aforementioned bouncy part that has your fingers quickly switching between 2 and 3 note chords playing 2 notes at a time with small gaps in between. The second part has you alt-strumming single notes, before gradually advancing into alt-strummed chords as the section goes on.
Both these parts are simple, but fun to play, and they act as a good wind down from the hardest, but most fun part of the song.
There's a section about halfway through that plays out with alt-strumming to start with, before throwing a long chain of hammer-ons that have your fingers moving back and forth in a zig-zagging motion, the gap between these notes getting bigger before stretching all the way to "G/B" and "G/O". This parts great, and it's a great break from the more predictable parts of the song.
Overall, this is a surprisingly good Guitar chart, and a catchy tune. I'd recommend this easily.