about adult love–I haven't experienced that yet". "I felt like it was my personality in that song". ARK Music extensively used the pitch-correcting software Auto-Tune. Although Kelly had some doubts over the quality of the lyrics, Black assured her that "she sang it as they wrote it." Composition Friday uses the '50s progression, a I–vi–IV–V chord progression that many popular songs have used such as "Heart and Soul" and "Unchained Melody". It is performed in the key of B major at a tempo of 112 beats per minute. According to Randy Lewis of the Los Angeles Times, the familiar structure contributes to the song's catchiness, making it what others have called an earworm. The song also sees Black on a harmony track. In a review for Rolling Stone, writer Matthew Perpetua described the vocals as having "a peculiar tonality that inadvertently highlights the absurdity of boilerplate pop lyrics", adding that the tone in the refrain "sounds unlike anything else in pop music". He noted the sound as being not entirely agreeable to listen to, but stated that Black ultimately ends up "sounding like a distinct singer with an alluring sort of anti-charisma". The lyrics of the song speak about "hanging out with friends and having fun". The lyrics reflect the happenings of a day, in the life of a teenager like Black, like eating breakfast and going to school. "She's excited 'cause it's Friday. Which means a weekend full of possibility awaits", a Plugged In reviewer concluded. Critical reception The song has received universally negative reviews from music critics, for its songwriting, instrumentation, Black's vocals, and the video choreography. Lyndsey Parker of Yahoo! Music asked if it could be "the worst song ever". On March 29, 2011, it surpassed Justin Bieber's "Baby" as the most disliked YouTube video, with 1.17 million dislikes, and once had over 3 million "dislikes", accounting for 88% of the total ratings of the video. The video was later removed, although it has since been officially re-uploaded. The co-writer and producer of "Friday", Clarence Jey, said about the song that "the concept we feel seems to have crossed a lot of boundaries, for the better or worse". Observers have called it "bizarre", "inept", and "hilariously dreadful". The song and Black herself were "savaged" on social networks across the Internet, while being seen as a "YouTube laughing stock". On YouTube, the video was met with negative comments