▲Like an unexpected phone call, Adele came out of nowhere with 'Hello' back in 2015. The aching ballad was number one for 10 weeks.

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Young rapper dons a cowboy hat and makes a quirky country song. What happened next? Well, 19 weeks at number one, thanks to remixes by Billy Ray Cyrus, Justin Bieber, Young Thug, and Mason Ramsey.

Now that you're here, also check out which TV theme tunes have hit the charts.

▲Despite emerging in the early '90s, Pharrell continues to be a top hitmaker. His upbeat 'Happy' went number one for 10 weeks.

▲Mixing rap, dancehall, afrobeat, and UK funky, Drake's first number one was a cross-genre smash, spending 10 weeks at number one.

▲The R&B legend struck gold with 'Un-Break My Heart,' a popular power ballad that went number one for 11 weeks.

▲A tribute to the murdered Biggie Smalls, this heartfelt single was a worldwide smash. 'I'll Be Missing You' was number one for 11 weeks straight, this back in 1997.

▲The Canadian rapper had a big 2018, with four number one singles, including viral hit 'In My Feelings.' It spent 10 weeks in the number one spot.

▲You might not hear much from All-4-One nowadays, but back in 1994, the group was enjoying the success of 'I Swear.' Their R&B smash was number one for 11 weeks.

▲A lead single from the 'Charlie's Angels' soundtrack, 'Independent Women' has become a modern anthem for strong women around the world. It was number one for 11 weeks.

▲Usher's unforgettable club hit went number one for 12 weeks, after hitting the top spot on March 2.

▲World's collide on 'Smooth,' a Latin pop jam with Santana and Rob Thomas. The catchy collab won a bunch of Grammys, and remained at number one for 12 weeks.

▲'Boom Boom Pow' was a futuristic hit that secured the number one spot for 12 weeks. As you'll soon see, 2009 was one successful year for the Black Eyed Peas.

▲The undeniable 'God's Plan' debuted at number one, and remained there for a whopping 11 weeks.

▲Robin Thicke's collab with T.I. and Pharrell was nonetheless a huge hit. The single was atop the Billboard Hot 100 for 12 weeks.

▲'Closer' was the first number one hit from Halsey and The Chainsmokers. The dance pop ballad was one of the biggest hits of 2016, with 12 weeks at number one.

▲Ed Sheeran's tropical gamble paid off, with 'Shape of You' sitting at number one for 12 weeks through 2017.

▲Wiz Khalifa's tribute to late actor Paul Walker arrived in 2015 and dominated the charts, spending 12 weeks at number one.

▲After Princess Diana passed away in Paris, Elton John reworked his 1974 song in tribute to her. It became one of the best-selling singles in history, spending 14 weeks at number one.

▲This Dolly Parton cover landed on the 'Bodyguard' soundtrack, and spent an astonishing 14 weeks at number one.

▲'The Boy Is Mine' made stars of Brandy and Monica, but also led to a years-long feud. Their irresistible duet was number one for 13 weeks.

▲A school dance staple for decades to come, 'Macarena' was an unlikely hit from Spanish duo Los Del Rio. The smash hit spent 14 weeks at the top spot.

▲The Grammy-winning R&B smash was number one for 13 weeks straight. It appeared on the soundtrack for Eddie Murphy's film 'Boomerang.'

▲The Boyz were back in '94, with sensual hit 'I'll Make Love to You.' The R&B classic went number one for 14 weeks.

▲Mariah Carey continued her reign through the 2000s, with the release of 'We Belong Together.' It was yet another success for the singer, charting at number one for 14 weeks.

▲The Spanish-language smash ruled charts around the world back in 2017. A remix by Justin Bieber helped 'Despacito' spend 16 weeks atop the Billboard charts.

▲Bruno Mars and Mark Ronson are a match made in heaven, and 'Uptown Funk' is their 'Amazing Grace.' The throwback hit went to the top of the charts for 14 weeks.

▲The uplifting dance song was released in June 2009, and is still getting plays 10 years later. It spent 14 weeks in the number one spot.

▲Nearly five minutes long and inspired by the AIDS epidemic, 'One Sweet Day' isn't the most predictable smash hit. However, the single spent 16 weeks in the number one spot. The song kept the record for 22 years, until 'Despacito' joined it in 2017.

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Say what you want, but pop music can be pretty unpredictable. There's no better proof of that than Lil Nas X, perhaps the most unlikely pop star of the decade. The young rapper was still a teen when he released 'Old Town Road,' a country-rap crossover that has made headlines and climbed charts around the world. Recently, the song beat a 24-year-old record, becoming the longest-running number one track on America's Billboard Hot 100. The quirky song spent 19 weeks at number one, being bested now by Billie Eilish's 'Bad Guy.'

To understand just how impressive that is, click on for a reminder of the longest-running number one singles on the Billboard Hot 100. Click on 'til you can't no more!

▲Combine Rihanna's pop flare with a cool Calvin Harris beat, and you have one of the biggest hits of recent years, which also spent 10 weeks atop the Billboard Hot 100.

▲An ode to Apple Bottom jeans spent 10 weeks on the chart back in 2008, kickstarting a long career for Floridian rapper Flo Rida.

The longest-running number one singles on the Billboard Hot 100

After 19 weeks at number one, Lil Nas X just lost top spot to Billie Eilish

20/08/19 por StarsInsider

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To understand just how impressive that is, click on for a reminder of the longest-running number one singles on the Billboard Hot 100. Click on 'til you can't no more!