Coldplay's latest album, Music of the Spheres, includes the song "My Universe," which took over two years to complete. "I got a message from someone about 18 months ago," Coldplay's Chris Martin confessed in a YouTube video in September. " 'Oh, BTS wants to make a song with you,' they said. 'How would it work?' I asked. I couldn't understand how that was possible." Martin started writing the song after hearing the words "my universe" from a friend, and then flew to South Korea to meet BTS for the first time. They set to work as soon as he arrived, and the rest is history!