This song is very common, is called "No woman, No cry".
It was sing by Robert Nesta Marley, alias Bos Marley. 
He was jamaican, son of african mother and english father (he never recognognized him). Then, they moved to Kingston and they lived in a depressed area. Here he received black people discrimanation and Rastafari religion influence. These aspects became so important to write his letters.
Now he´s an icon to lot of peolple, especially young. His letters are fills, loaded of social content.
I don´t remember very well the first time that I listened this song, but I become to familiarize whit Bob Marley about approximately ten years old. I liked to much because, without understand the letters, I found the songs very happy. One day I saw a honey moon video about my uncles. It happened just in Jamaica and it use Bob Marley music. Then I really like it.
After, in seventh grade, I bought a Bob Marley CD, it had 31 songs. I remember to have listened a lot, but I emphasize "No Woman, No Cry":
No, woman, no cry;
No, woman, no cry;
No, woman, no cry;No, woman, no cry.
Said - said - said:
I remember when we used to sit
In the government yard in trenchtown,
Oba - obaserving the ypocrites
As they would mingle with the good people we meet.
Good friends we have, oh, good friends weve lost
Along the way.
In this great future, you cant forget your past;
So dry your tears, I seh.No, woman, no cry;
No, woman, no cry.
ere, little darlin, dont shed no tears:
No, woman, no cry.
Said - said - said: I remember when-a we used to sit
In the government yard in trenchtown.
And then georgie would make the fire lights,
As it was logwood burnin through the nights.
Then we would cook cornmeal porridge,
Of which Ill share with you;
My feet is my only carriage,
So Ive got to push on through.
But while Im gone, I mean:
Everythings gonna be all right!
Everythings gonna be all right!
Everythings gonna be all right!
Everythings gonna be all right!
I said, everythings gonna be all right-a!
Everythings gonna be all right!
Everythings gonna be all right, now!
Everythings gonna be all right!
So, woman, no cry;
No - no, woman - woman, no cry.
Woman, little sister, dont shed no tears;
No, woman, no cry.
I remember when we used to sit
In the government yard in trenchtown.
And then georgie would make the fire lights,
As it was logwood burnin through the nights.
Then we would cook cornmeal porridge,
Of which Ill share with you;
My feet is my only carriage,
So Ive got to push on through.
But while Im gone:
No, woman, no cry;
No, woman, no cry.
Woman, little darlin, say dont shed no tears;
No, woman, no cry.
Eh! (little darlin, dont shed no tears!
No, woman, no cry.
Little sister, dont shed no tears!No, woman, no cry.)
After all, I want to tell you that I like Bob marley before this fashion caused by marihuane.