What's your definition of the "Perfect Song" and what is your favorite song/genre?

Title says it all; What is the perfect song and what's your favorite?
For me, ( without going into all the technicals of music) a perfect song is one that can be listened to over and over again without it seeming very repetitive and has a continuously moving "Beat" ( Melody and bass in sync with each other and are at a fairly swift tempo). Generally, my favorite genre of music is videogame music, mainly by the composer named Koji Kondo, who composed majority of the 'hit' themes from Nintendo ( Super mario brothers, Zelda, Punch out, etc). I personally don't have a favorite song as it always changes as well.

~Musically, Seriously Dirty Dan

 

You basically already said it for me. A song I could never grow tired of hearing. And one that never loses that first feeling I got when I first heard it.

My Favorite song till the day I die:

 

Seven Nation Army - The White Stripes

 

Hip hop till I die

What I think makes a song perfect is good bars and how good the beat is, it can make a song sound good to me even if the lyrics suck

 

I feel that a song is perfect if it doesn't need any changes done to it.

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To me, the perfect song is something that makes me want to dance where I stand and not give a shit if someone saw me. Upbeat - catchy - possibly 80's electro vibe is what my favorite is.