Okay, first of all, I've been looking for this song for about 2-3 years now. It's a rap song about a veteran (from first person), talking about the war. One line is along the lines of "bombs under my bed". Towards the end of the song, the rap says about how the family were throwing a party for the soldier to come home, and on his way home, got shot and killed. The wife's name was Mrs. Blue in the song.
The song cover looks like a picture of 2 guys sitting on a bench next to each other, if this helps.
Also, this song was on a mw3 glitch video on underground, but I think the video has been removed.