Latino Song(Need help finding song) please!

Okay this song is in Spanish, my spanish teacher showed it to me I know a little bit about it maybe that will help you it's just so dam hard to use google when I can't speak excellent spanish.

The style of the song is kind of rap like but there's parts with just regular singing and they say this one sound a few times maybe like o lol I know that's not much but.

The video he showed me was like 5:05 seconds long it's a long to, the guy in the video like rapping has a shaved head and there's an older guy who does the singing parts.

I know in the song the guy says "Respect those who you walk with", he says it in spanish though.

There's also a part of the song where a guy says something like Por la luna ...somethingsomethingl... una

The video starts out with a kid walking in an ally and a guy says What are you looking @?(in spanish though)

It's shot in puerto rico I believe or @ least the singer is cause they waved a puerto rican flag and my teacher was showing us it cause the kids in my class are dickheads and he was saying that the song is about growing up poor in puerto rico and how he grew up poor there.

PLEASE FIND THIS SONG, ITS SOOOOOOOOOOO GOOOOOOOOD

thank you

Hi the song you're looking for is "La Perla by Calle 13"

The Long version: http://www.youtube.com/watch?v=B0cVKmkYamU

The Short Version: http://www.youtube.com/watch?v=LxdXfpyyFGg

If u liked that song try to search other songs from Calle 13, they r really good!!