To start off, I really like this. I can sort of relate to it, my best friend was diagnosed with cancer in 5th grade, and the whole time she was sick, I felt my mom loved my friend more than me. I know it was stupid and selfish, but thats how I felt.
Now, Chemo doesn't have a "K". Cancer patients are allowed into the sun as much so I don't know about the tan head-ness. And why is she third? Her brother's "first", but who's second?
This is really good, and I love the repeating /chorus/ type thing. Excellent.

I think this is amazing. It's strong in every part and probably hits home for a lot of people, though not for me. This is very good.

Kemo’s not workin, we’ll be there soon.”... Chemo

Ok I really like the idea behind this piece.. it's very personal and something not really discussed and you definitely made the reader feel for Liz more than her brother

I liked it up until the part where they find her writing.. I couldn't understand how that stanza when they're realizing their mistake is followed by them making a mistake that seemed off.. I think the next stanza could be about her coming out of school and them being there because that's the result of them finding her writing, no?

Also I don't see why you repeated those two stanzas twice at the end... it didn't really seem necessary

But it was still a really great piece with a good point and a sweet ending

This is good but I think you also know that it could have been great if you had narrated more of Liz's saga.

okay i thought is was amazingly clear about the basic story. and i didn't think it was forced at all, minus the fact that our stupid teacher FORCED it out of us. =D no affect at all on the awesomeness of the poem/song.

xoxox,
lu