Zayn Malik has plenty to celebrate with the success of his first solo single. Not only did "PillowTalk" top the charts in 60 countries, but it also entered the U.S. Billboard Hot 100 at number one – something the 23-year-old singer never achieved in five years with One Direction.
Despite the boy band's popularity in the United States, the band has yet to top the Billboard charts and peaked at number two with the single "Best Song Ever" in 2013. Zayn's solo single has also become only the 25th song to debut at number one in the Hot 100, following in the footsteps of Adele's "Hello."
The star is evidently thrilled at his chart success, and thanked fans for their support on Twitter on Monday. "What is gwaning :) !! I can't explain the love and gratitude I feel today, thank you for making this happen," he wrote.
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Zayn also shared a black-and-white photo of himself clutching a bunch of celebratory balloons, including a silver number one balloon in recognition of his chart success.
The singer released his debut single at the end of January, with a music video in which he puts on a tactile display with his girlfriend Gigi Hadid, who he has reportedly been dating since the end of October.
The video has already been viewed over 62 million times, and Zayn has also secured the fastest-selling U.K. single of the year so far, with combined sales of 112,000 and 4.97 million streams.
Zayn will be especially proud of his success, as he has strayed from One Direction's pop sound for music he says he feels is "cooler" and that he believes in.
" I don't think I could ever go back to being completely normal. I guess that's something I accepted, that this is as normal as it gets for me," Zayn said during an interview on Capital Radio. "I just want to make music that I believe in and music that I stand for."