据楼主所言来看，应该就是Avril Lavigne（艾薇儿·拉维妮）的《How does it Feel》。
但是歌词并不是楼主说的“day for me day for me”，而应该是“you’re different from me ，different ”。
楼主可以下载来听听试试。
歌曲：how does it feel
歌手：avril lavigne 专辑：under my skin
歌曲:《how does it feel》
歌手:Avril Lavigne（艾薇儿·拉维妮）
专辑:《under my skin》
i'm not afraid of anything
i just need to know that i can breath
and i don't need much of anything
but suddenly suddenly
i am small and the world is big
all around me is fast moving
surrounded by so many things
suddenly suddenly
how does it feel
to be different from me
are we the same
how does it feel
to be different from me
are we the same
how does it feel
i am young
and i am free
but i get tired and i get weak
i get lost and i can't sleep
but suddenly suddenly
how does it feel
to be different from me
are we the same
how does it feel
to be different from me
are we the same
how does it feel
would you comfort me
would you cry with me
ah ah ah ~i am small
and the world is big
but i'm not afraid of anything
how does it feel
to be different from me
are we the same
how does it feel
to be different from me
are we the same
how does it feelhow does it feel
to be different from me
are we the same
how does it feel
to be different from me
are we the same
how does it feeloh oh oh...how does it feel
how does it feel
your different from me
different
how does it feel
how does it feel
your different from me
different
LRC歌词来自：
http://www.51lrc.com/asp/lrc.asp?id=20040518bSOLbi