Title: Lists of UK Singles Chart number ones
Content:  The calendar year that has featured the most UK number ones is 2000, which featured 42 singles reaching the top spot; the year with the fewest number ones is 2016 with 10, followed by 1954 with 11, just ahead of 1956, 1962, 1992 and 2019 with 12. The act that has achieved the most number ones is American entertainer Elvis Presley, who has topped the chart 21 times – Presley's second number one, "Jailhouse Rock" was the first single ever to debut at the top of the chart. The most successful band are The Beatles, who have achieved 17 number ones on the chart. The Beatles' first chart-topper, "From Me to You", reached number one in May 1963. In the 1970s the required number of sales 
Title: List of artists who have achieved simultaneous UK and US number-one hits
Content:  A number of artists have achieved either simultaneous number one singles or albums on the official charts in the UK and the US (Billboard in the United States and the Official Charts Company from the United Kingdom, also the BPI). , twelve artists have achieved this feat simultaneously in both the singles and albums chart: The Beatles, The Monkees, Simon & Garfunkel, Rod Stewart, Men at Work, Michael Jackson, Beyoncé, Drake, Ed Sheeran, Taylor Swift, Ariana Grande and Lady Gaga. All of these have been at number one in all four charts on the same week. The single that has spent the longest period of time at number-one simultaneously in the UK and US is Ed Sheeran's "Shape of You" in 2017, which spent 11 weeks number-one in both countries, while the longest serving album is the South Pacific cast's "South Pacific" (1958) album which spent 26 weeks number-one in both countries.
Title: Elvis Presley
Content:  that the Beatles hold the record for most number-one hits with 20, and that Mariah Carey is second with 18. Whitburn has Presley also with 18, and thus tied for second; Billboard has him third with 17. Presley retains the record for cumulative weeks at number one: alone at 80, according to Whitburn and the Rock and Roll Hall of Fame; tied with Carey at 79, according to Billboard. He holds the records for most British number-one hits with 21, and top ten hits with 76. As an album artist, Presley is credited by Billboard with the record for the most albums charting in the Billboard 200: 129, 
Title: Dance Club Songs
Content: Madonna holds the record for the most chart hits, the most top-twenty hits, the most top-ten hits and the most total weeks at number one (75 weeks). ; Enrique Iglesias, Dave Audé, Pitbull, and David Guetta are tied with 14 number-ones on the chart, the most among male artists. ; Rihanna became the first artist to earn 4 number-ones on the chart in a year (2007), a feat she repeated a record 3 additional times before becoming the first act to earn 5 number-ones in a year (2017) as well. ; Madonna scored three number-ones in a single year seven 
Title: Hot Country Songs
Content:  George Strait has the most number one hits, at 44. Dolly Parton has the most number ones of any female artist, with 25.
Title: List of artists with the most UK top-ten singles
Content:  in 2005 which reached the same position after being re-released along with many of Presley's other hits to mark what would have been his 70th birthday. Cliff Richard is in second place, his 68 hit singles including his work with The Shadows. He was last seen in 2008 with "Thank You for a Lifetime", having made his chart debut with "Move It" in 1958. Madonna has the third most entries of all time in the top 10, her 63 hits spanning 25 years from "Holiday" in 1984 through to "Celebration" in 2009. She made history and gained a spot in the Guinness World Records in 1998 that still remains for most consecutive top 10 singles, with 36 between 1984 and 1994. 
Title: UK Albums Chart
Content:  Main Street and Goats Head Soup, as brand new hits/number 1s due to the amount of bonus material available, formats released and the fact that the issuing record label had changed. As of February 2021, Elvis Presley is still the male solo artist with the most weeks at number one with a total of 66 weeks and most top ten albums by any artist, charting 53 releases. Presley also holds the joint-record for the most number one albums by a solo artist with Robbie Williams, each charting 13 times at number one. Madonna has the most number one albums (12) by 
Title: Billboard 200
Content: As a musician, Paul McCartney has the most number-one albums, with 27. This includes 19 albums from his work with The Beatles, 3 solo albums, and 5 albums as a part of his 1970s group Wings.  John Lennon is in second place with 22, including 19 albums with the Beatles, 2 solo albums, and 1 album credited to him and his wife Yoko Ono. George Harrison had 19 number-one albums with The Beatles and 2 as a solo artist. ; Barbra Streisand is the only artist to have number 1 albums in six different decades. Her first was the 1964 album People and her most recent was the 2016 album Encore: Movie Partners Sing Broadway, with a few weeks shy of 52 years between the two hitting number 1. 
Title: List of artists by number of UK Singles Chart number ones
Content:  Star", giving the former act 5 number ones and the latter 4 number ones according to their information (though this featured credit is on the single's cover and CD's label). Elvis Presley has amassed 21 number ones on the UK Singles Chart, including three re-releases which are counted as separate chart entries/chart hits due to the records' catalogue numbers changing in 2005. With or without the releases, Presley's total is still more than any other artist in history. The Beatles hold the record for the most number-ones singles by a group (with 17), while Madonna holds the record for a female artist (with 13).
Title: List of Billboard Hot 100 number-one singles of the 2000s
Content:  the 1990s's trend of sentimental ballads. While the first half of the 2000s saw the continued relevance of physical sales, the second half welcomed the dominance of digital sales performance thanks to advancements of the internet, through which music was widely distributed. During the ten-year period, Usher was the most successful artist, accumulating seven number-one entries and spending 41 weeks on the top spot, more than any other act. Beyoncé followed with five number ones and 36 weeks atop the chart, the most among female musicians. Other artists with at least four number-one singles were Rihanna (five) and Mariah Carey, Alicia Keys, 50 Cent, Ludacris, Nelly and Justin Timberlake (four each), 

Question: who has the most number one single hits?
Answer: The Beatles.