where was it performed live?
In Europe the song was performed at the Live 8 charity concert, the Fashion Rocks in Monaco
We Belong Together
In Europe the song was performed at the Live 8 charity concert, the Fashion Rocks in Monaco, and the German Bambi Awards. 
what album is we belong together by mariah carey on "The Emancipation of Mimi" who is the singer of this song? Mariah Carey does it has any remix version? Yes, she  recorded an official remix version for it. which award did it fetch? MTV Movie Awards, MTV Video Music Awards, Macy's Fourth of July Parade, "The Oprah Winfrey Show" and the 48th Grammy Awards.
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We Belong Together [SEP] Introduction
Rumors arose of the video's connection to her 1993 marriage to Tommy Mottola. Carey performed the song on several award shows and television appearances around the world, namely MTV Movie Awards, MTV Video Music Awards, Macy's Fourth of July Parade, "The Oprah Winfrey Show" and the 48th Grammy Awards. In Europe the song was performed at the Live 8 charity concert, the Fashion Rocks in Monaco, and the German Bambi Awards. Carey performed the song while on The Adventures of Mimi Tour and the song has been on every tour set list since then.