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11. Adele: 'Hello' - Adele made a big comeback in 2015, with the release of her smash hit 'Hello.'

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11. Adele: 'Hello' - The blue-eyed soul song went number one around the world. The music video got over 27 million views in 24 hours.

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10. Nicky Jam: 'X (Equis)' feat. J Balvin - Nicky Jam is a Boston-born reggaeton artist. He isn't exactly a household name, but his collab with J Balvin became a huge hit.

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10. Nicky Jam: 'X (Equis)' feat. J Balvin - The video was viewed over 29 million times in its first day.

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9. Twice: 'Yes or Yes' -

Twice is a Korean group made up of nine members. 'Yes or Yes' is perhaps their biggest hit yet.

(Photo: Wikimedia/CC BY 4.0)

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9. Twice: 'Yes or Yes' - The video for 'Yes or Yes' was viewed over 31 million times just 24 hours after release.

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8. BTS: 'Fake Love' - BTS are the ones to know in the world of K-pop. Their records have sold millions around the world, and the band is starting to break into America.

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8. BTS: 'Fake Love' - The video, directed by Choi YongSeok, reached nearly 36 million views in its first 24 hours.

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7. Psy: 'Gentleman' - 'Gangnam Style' was the big hit for Psy, which built up anticipation for his follow-up, 'Gentleman.'

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7. Psy: 'Gentleman' - Like its predecessor, 'Gentleman' came with a hilarious music video, which received 36 million views in a day.

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6. BlackPink: 'Ddu-Du Ddu-Du' - BlackPink are one of the biggest (if not the biggest) K-pop girl groups. They reached the US charts with their hit single, 'Ddu-Du Ddu-Du.'

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6. BlackPink: 'Ddu-Du Ddu-Du' - When it was released, the music video became the most-viewed Korean music video in 24 hours. It was seen over 36 million times in a day.

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5. Eminem: 'Killshot' - With songs like 'Not Afraid,' 'Lose Yourself,' 'Love the Way You Lie,' Eminem has had some huge hits. However his biggest YouTube debut came from an unexpected place.

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5. Eminem: 'Killshot' - 'Killshot' didn't even have a video. It's a venomous response to Machine Gun Kelly, who dissed Eminem on his song 'Rap Devil.'

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4. Taylor Swift: 'Look What You Made Me Do' - Eminem isn't the only artist who made a big comeback on YouTube. This pop star broke records with her video, 'Look What You Made Me Do.'

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4. Taylor Swift: 'Look What You Made Me Do' - The video features bathtubs full of diamonds and even a zombie Taylor Swift. The vid was watched over 43 million times in 24 hours.

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3. BTS: 'Idol' - Back to BTS, the K-pop troubadours broke their own records with the video for 'Idol.'

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3. BTS: 'Idol' - The song, which was later remixed by Nicki Minaj, was watched a stunning 45.9 million times in a day.

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2. Ariana Grande: 'Thank U, Next' - Ariana Grande didn't waste time after the success of 'Sweetener,' following it up with break-up anthem 'Thank U, Next.'

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2. Ariana Grande: 'Thank U, Next' - The hotly-anticipated video saw Grande star in spoofs of movies like 'Mean Girls,' 'Legally Blonde,' and 'Bring It On.' It was viewed 55.4 million times in a day.

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1. BlackPink: 'Kill This Love' - That's right, BlackPink are the winners this time, with their new smash hit 'Kill This Love.'

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1. BlackPink: 'Kill This Love' - The visual, directed by Hyun Seung Seo, has really taken off. It was viewed 56.6 million times in under a day.

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Not just music videos - It isn't just music videos that debut highly on YouTube. In fact, Hollywood trailers take the cake as far as YouTube debuts go.

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8. 'Beauty and the Beast' - The live-action Disney remake stars Emma Watson and Dan Stevens. The trailer was viewed over 127 million times in a day.

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7. 'Spider-Man: Far From Home' - The 'Spider-Man' film sees Peter Parker go on vacation to Europe. A trailer for the film got 130 million views in its first 24 hours of release.

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6. 'Thor: Ragnarok' - The fun 'Thor' film was a hit with audiences. The quirky trailer was watched over 136 million times in its first day.

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5. 'The Fate of the Furious' - After the death of Paul Walker, 'Fast and Furious' fans were desperately awaiting the next installment. That's probably why this trailer got 139 million views in 24 hours.

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4. 'It' - The 'It' remake was way more popular than expected. The terrifying trailer was viewed 197 million times in 24 hours.

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3. 'The Lion King' - 'The Lion King' is stacked with stars, like Beyoncé, Donald Glover, and James Earl Jones. The emotional trailer was watched a whopping 268 million times in 24 hours.

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2. 'Avengers: Infinity War' - 'Infinity War' was lauded as one of the most ambitious movies ever. Fans flocked to see the second trailer, 230 million times to be exact.

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1. 'Avengers: Endgame' - It all ends with 'Endgame.' It could well be the final film in the Marvel Cinematic Universe, and the trailer was viewed nearly 290 million times in the first 24 hours.

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