I heard this song and I don't know who sings it, but I only know like 1 line to it... I know it goes something like " while jay-z and beyonce were muah muah kissing, i was in the back bagging grams in the kitchen"

The song you are referring to is by 50 Cent," Fully Loaded Clip (http://www.youtube.com/watch?v=Ppw85A7YcL8)".