U2 are an Irish rock band from Dublin. Formed in 1976, the group consists of Bono (vocals and rhythm guitar), the Edge (lead guitar, keyboards, and vocals), Adam Clayton (bass guitar), and Larry Mullen, Jr. (drums and percussion). U2's early sound was rooted in post-punk but eventually grew to incorporate influences from many genres of popular music. Throughout the group's musical pursuits, they have maintained a sound built on melodic instrumentals. Their lyrics, often embellished with spiritual imagery, focus on personal themes and sociopolitical concerns.

The band formed at Mount Temple Comprehensive School in 1976 when the members were teenagers with limited musical proficiency. Within four years, they signed with Island Records and released their debut album Boy. By the mid-1980s, U2 had become a top international act. They were more successful as a touring act than they were at selling records until their 1987 album The Joshua Tree which, according to Rolling Stone, elevated the band's stature "from heroes to superstars". Reacting to musical stagnation and criticism of their earnest image and musical direction in the late 1980s, U2 reinvented themselves with their 1991 album, Achtung Baby, and the accompanying Zoo TV Tour; they integrated dance, industrial, and alternative rock influences into their sound, and embraced a more ironic and self-deprecating image. They embraced similar experimentation for the remainder of the 1990s with varying levels of success. U2 regained critical and commercial favour in the 2000s with the records All That You Can't Leave Behind (2000) and How to Dismantle an Atomic Bomb (2004), which established a more conventional, mainstream sound for the group. Their U2 360° Tour of 2009–2011 is the highest-attended and highest-grossing concert tour in history.

U2 have released 13 studio albums and are one of the world's best-selling music artists of all time, having sold more than 170 million records worldwide. They have won 22 Grammy Awards, more than any other band, and, in 2005, were inducted into the Rock and Roll Hall of Fame in their first year of eligibility. Rolling Stone ranked U2 at number 22 in its list of the "100 Greatest Artists of All Time". Throughout their career, as a band and as individuals, they have campaigned for human rights and philanthropic causes, including Amnesty International, the ONE/DATA campaigns, Product Red, War Child and the Edge's Music Rising.

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Bob Dylan (born Robert Allen Zimmerman; May 24, 1941) is an American singer-songwriter, author, and visual artist who has been a major figure in popular culture for more than 50 years. Much of his most celebrated work dates from the 1960s, when songs such as "Blowin' in the Wind" (1963) and "The Times They Are a-Changin'" (1964) became anthems for the civil rights and anti-war movements. His lyrics during this period incorporated a range of political, social, philosophical, and literary influences, defied pop music conventions and appealed to the burgeoning counterculture. Following his self-titled debut album in 1962, which mainly comprised traditional folk songs, Dylan made his breakthrough as a songwriter with the release of The Freewheelin' Bob Dylan the following year. The album featured "Blowin' in the Wind" and the thematically complex "A Hard Rain's a-Gonna Fall". For many of these songs, he adapted the tunes and phraseology of older folk songs. He went on to release the politically charged The Times They Are a-Changin' and the more lyrically abstract and introspective Another Side of Bob Dylan in 1964. In 1965 and 1966, Dylan drew controversy when he adopted electrically amplified rock instrumentation, and in the space of 15 months recorded three of the most important and influential rock albums of the 1960s: Bringing It All Back Home (1965), Highway 61 Revisited (1965) and Blonde on Blonde (1966). Commenting on the six-minute single "Like a Rolling Stone" (1965), Rolling Stone wrote: "No other pop song has so thoroughly challenged and transformed the commercial laws and artistic conventions of its time, for all time."In July 1966, Dylan withdrew from touring after a motorcycle accident. During this period, he recorded a large body of songs with members of the Band, who had previously backed him on tour. These recordings were released as the collaborative album The Basement Tapes in 1975. In the late 1960s and early 1970s, Dylan explored country music and rural themes in John Wesley Harding (1967), Nashville Skyline (1969), and New Morning (1970). In 1975, he released Blood on the Tracks, which many saw as a return to form. In the late 1970s, he became a born-again Christian and released a series of albums of contemporary gospel music before returning to his more familiar rock-based idiom in the early 1980s. Dylan's 1997 album Time Out of Mind marked the beginning of a renaissance for his career. He has released four critically acclaimed albums of original material since then, the most recent being Rough and Rowdy Ways (2020). He also recorded a series of three albums in the 2010s comprising versions of traditional American standards, especially songs recorded by Frank Sinatra. Backed by a changing lineup of musicians, he has toured steadily since the late 1980s on what has been dubbed the Never Ending Tour. Since 1994, Dylan has published eight books of drawings and paintings, and his work has been exhibited in major art galleries. He has sold more than 100 million records, making him one of the best-selling music artists of all time. He has received numerous awards, including the Presidential Medal of Freedom, ten Grammy Awards, a Golden Globe Award and an Academy Award. Dylan has been inducted into the Rock and Roll Hall of Fame, Nashville Songwriters Hall of Fame and the Songwriters Hall of Fame. The Pulitzer Prize Board in 2008 awarded him a special citation for "his profound impact on popular music and American culture, marked by lyrical compositions of extraordinary poetic power". In 2016, Dylan was awarded the Nobel Prize in Literature "for having created new poetic expressions within the great American song tradition".