and Alex Greggs, known as Riprock 'n' Alex G, returned from No Strings Attached to write and produce three tracks: "The Two of Us", "Up Against the Wall", and "The Game is Over". Bass stated that "The Two of Us" was inspired by the music of Craig David. Composition and lyrical content Celebrity includes elements of several musical genres, including pop, R&B, teen pop, and urban. In contrast to No Strings Attached, the decision to experiment with different sounds on songs such as "Pop" was made so NSYNC could appear more mature and musically diverse. The album fuses sounds from NSYNC's earlier songs such as "Bye Bye Bye" (2000) with experimental genres, including hip hop and British two-step. Several of the producers who worked on Celebrity influenced the unique sound of each track, which was attributed to the band's self-awareness and desire to accentuate different aspects of their music. The album's first track, "Pop", refers to NSYNC's defense of the pop genre towards their critics. Larry Flick of Billboard described the song as "a crafty, anthemic blend of Cameo-style electro-funk beats, Euro-pop synths, heavy-metal guitars, and Timberlake's now-signature human beat-box riffs", while John Hugar of Uproxx referred to it as "a sort of proto-salvo against in the rockist vs. poptimists argument", and called the song a preview of Timberlake's 2003 single "Rock Your Body". The next track, "Celebrity", was produced by Rodney Jerkins, who used "low-key, funksome, two-step slither" along with camera clicks. The lyrics outline the negative consequences of being "a multi-millionaire, globe-trotting pop star", while Jon O'Brien of Billboard noted that the song is influenced by the Blackstreet and Janet Jackson song "Girlfriend/Boyfriend" (1999). "The Game is Over", according to Barry Walters of Rolling Stone, includes the "Pac-Man theme and dance-y squeaks", and "echoes the sounds and sentiments of the last album's edgiest cuts". The fourth track, "Girlfriend", is an R&B song that was produced by the Neptunes. A remix of the track that features rapper Nelly was noted for giving the song a hip hop influence. Nelly raps over a minimal guitar figure for two verses; the first which lasted for 61 seconds before the song's first verse. "The Two of Us" is an "R&B waltz" containing a "British dancefloor beat", which was compared to that of "Digital Get Down" from No Strings Attached. Staff writers at Billboard considered the ballad "Gone" to be "harrowing, relentless and