Payne shot to worldwide fame as a member of pop group One Direction, one of the most successful boy bands in history. The group, consisting of Payne, Harry Styles, Louis Tomlinson, Niall Horan, and Zayn Malik, formed in 2010 and competed on The X Factor before being signed by Simon Cowell’s record label.

One Direction’s first four albums debuted at number one on the Billboard US charts, a first for any band, and produced hit singles including “What Makes You Beautiful,” Story of My Life” and “Live While We’re Young.”

The band members became teen idols, worshipped by legions of hysterical fans, and embarked on four successful world tours. After the group went on hiatus in 2016, Payne had a successful solo career.

For a generation of teen girls who grew up loving One Direction, Payne’s sudden passing came as a devastating shock. Fans have been sharing tributes on social media and even holding vigils in his honor.

“He was my favorite,” Camila Martínez, a 24-year-old mourning outside the hotel in Argentina, told the New York Times. “My heart shattered when the band split. My life was tough, and I’d turn to their music whenever I felt sad.”

Many of Payne’s musical collaborators also expressed shock and sadness.

“I am in shock right now,” the musician Charlie Puth wrote, remembering Payne as “one of the first major artists I got to work with.” “I can not believe he’s gone.”

“I’m devastated,” wrote the British singer-songwriter Rita Ora, who collaborated with Payne on the song “For You.” “He had the kindest soul, I will never forget. I loved working with him so much – he was just such a joy to be around on and off stage. This tragic news breaks my heart. Sending all my love and prayers to his family and loved ones.”

Payne’s One Direction bandmates also released a joint statement on his death this afternoon:

“We’re completely devastated by the news of Liam’s passing,” their statement reads, according to the Hollywood Reporter. “In time, and when everyone is able to, there will be more to say. But for now, we will take some time to grieve and process the loss of our brother, who we loved dearly. The memories we shared with him will be treasured forever. For now, our thoughts are with his family, his friends, and the fans who loved him alongside us. We will miss him terribly. We love you Liam.”

Rest in peace, Liam Payne — you will be missed by so many fans around the world. What a tragic way to go ??