YouTube is the world's No. 1 music streaming platform where you could view the music videos, old and new alike. Here is a list of the top 20 most-viewed music videos of all time (based on April 9, 2020 figures): 

#20. "Blank Space" - Taylor Swift (2.573 billion)

The song marked the singer-songwriter's transition from core country to pure pop music. "Blank Space" was released on November 11, 2014, from Swift's fifth studio album, "1989". It topped the Billboard Hot 100 chart in the same month. In case you are wondering, supermodel Sean O'Pry is the hot guy on the MV.

#19. "Hello" - Adele (2.639 billion)

The English diva, Adele released the 2017 Grammy Award Song of the Year on October 23, 2015. "Hello" is the lead single from her third album, "25."

#18. "Mi Gente" - J Balvin, Willy William (2.658 billion)

The Spanish song "Mi Gente" was uploaded on June 30, 2017. That year, it ranked as the third-fastest music video to hit 400 million hits on YouTube.

#17. "Let Her Go" - Passenger (2.662 billion)

Passenger, Mike Rosenberg's moniker, wrote the song and was released on July 25, 2012. It ranked highest at No. 5 on the Billboard Hot 100 chart in February 2014.

#16. "Faded" - Alan Walker (2.709 billion)

"Faded" was created by DJ Alan Walker, a Norwegian record producer. The electro-pop song released on December 3, 2015, featured the vocals of Iselin Solheim, also a Norwegian.

#15. "Dark Horse" - Katy Perry (ft. Juicy J) (2.756 billion)

The pop-trap hit, released in September 2013, had the official MV with the Egyptian theme uploaded on February 20, 2014. "Dark Horse" is the record-holder of the first video by a female artist to break one billion views. It landed No. 1 spot in Jan. 2014 on Billboard chart.

#14. "Lean On" - Major Lazer & DJ Snake (feat. MØ) (2.778 billion)

The group Major Lazer is a Jamaican-American electro-dance music trio of which Diplo is one of the members. It landed on YouTube on March 23, 2015.

#13. "Bailando" (Español) - Enrique Iglesias (ft. Descemer Bueno, Gente De Zona (2.838 billion)

"Bailando", released on April 11, 2014, is the third Spanish song included in this list. The English version music video was released later in June 2014.

#12. "Shake It Off" - Taylor Swift (2.897 billion)

Released on August 19, 2014, "Shake It Off" is the lead single in the album "1989." The most successful Billboard chart-topper from Swift is the second song from the same album on this list.

#11. "Counting Stars" - OneRepublic (2.949 billion)

The song peaked at No. 2 in January 2014, though the video was uploaded earlier on May 31, 2013. The single was released a half month later. It stayed for 68 weeks on the Billboard chart.

#10. "Thinking Out Loud" - Ed Sheeran (2.955 billion)

The song was out on September 24, 2014, with the official video shown on October 7, 2014. The 2016 Grammy Song of the Year reached its highest at No. 2 in January 2015 in Billboard Hot 100.

#9. "Roar" - Katy Perry (3.045 billion)

The queen-of-the-jungle music video got one billion views on YouTube in July 2015. Official MV premiered on September 6, 2013. Katy Perry is the first artist to reach a billion views milestone with two videos.

#8. "Sugar" - Maroon 5 (3.162 billion)

The "wedding crashers" video was an instant hit when it premiered on January 14, 2015. "Sugar" received a nomination for the 2016 Grammy Award Best Pop Duo/Group Performance.

#7. "Sorry" - Justin Bieber (3.27 billion)

The dance music video was released on October 23, 2015. Though Beiber never appeared in the video, it was the fifth-fastest one to reach one billion views.

#6. "Gangnam Style" - PSY (3.571 billion)

PSY, a South Korean singer, never expected the catchy "Gangnam Style" will be the first video to reach one billion views on YouTube.

#5. "Uptown Funk" - Mark Ronson (ft. Bruno Mars) (3.815 billion)

British producer Mark Ronson recorded the Grammy Award Record of the Year in 2016. The MV premiered on November 19, 2014.

#4. "See You Again" - Wiz Khalifa (ft. Charlie Puth) (4.492 billion)

"See You Again" came from the OST of the "Furious 7" film. The music video, a tribute to the late Paul Walker, was uploaded on April 7, 2015.

#3. "Shape of You" - Ed Sheeran (4.712 billion)

Premiered on YouTube on January 30, 2017, this was the second hit song from Sheeran to reach the billion views milestone. In March 2017, it topped the Billboard Hot 100 chart. The song gave him the Grammy Award for Best Pop Solo Performance.

#2. "Baby Shark Dance" - Pinkfong Songs for Children (5.064 billion)

The highly infectious children's song became a viral dance challenge. "Baby Shark" has several videos, and collectively, it garnered 5 billion views. It stands as No. 1 in YouTube's Education category.

#1. "Despacito" - Luis Fonsi (ft. Daddy Yankee) (6.707 billion)

"Despacto", the original Spanish version, became the first song in said language to top the Billboard 100 in 20 years. Released on January 13, 2017, it holds the record on YouTube of breaking the three, four and five billion views. On February 24, 2019, it became the first music video to reach 6 billion views. Puerto Rican Fonsi, who wrote it, said the remix version with Justin Beiber gave more success to the hit song.