"Big Brother" was co-written by West and Toomp, who was the sole producer. It originally utilized Prince's "It's Gonna Be Lonely" for the beat, until he refused to approve and a re-recording was done. The song was written by West as a tribute to his close friend and mentor Jay-Z, who has shown his appreciation for it. West first teased the song in August 2007 for the BBC Radio 1Xtra event "Audience with Kanye West". A hip hop song with synths, it features a varied pace of rapping from West. In the lyrics, West introspectively examines the complexities of his friendship with Jay-Z. - Wikipedia