南非世界杯Wavin’Flag为什么有两种不同版的歌词，求解..

一种是未成为世界杯主题歌之前的版本，另外一种的是被选为主题歌后改编的版本。

Give me freedom, give me fire,

give me reason, take me higher
See the champions, take the field now,

you define us, make us feel proud
In the streets are, exaliftin ,

as we lose our inhibition,
Celebration its around us,

every nations, all around us
Singin forever young,

singin songs underneath that sun
Lets rejoice in the beautiful game.
And together at the end of the day.

WE ALL SAY
When I get older I will be stronger
They'll call me freedom Just like a wavin' flag

When I get older I will be stronger
They'll call me freedom Just like a wavin' flag
So wave your flag
Now wave your flag
Now wave your flag

and everybody will be singing it

and we all will be singing it

那首开始便是when i get old的轻唱在前。Wavin'flag是2010年世界杯主题曲曲名，由索马里裔嘻哈歌手K'naan创作。Wavin'flag是他2009年2月底发行的专辑《游吟诗人》中的一首歌，即那首开始便是when i get old的轻唱，最终被南非世界杯组委会相中。K'naan特别为世界杯重新制作一款混音版的Wavin'flag用于宣传，即开头是Give me freedom, give me fire 的那首