If you watched The Voice Season 21 finale last year, you probably saw Coldplay perform their song “My Universe” with K-pop band BTS. What made the performance so cool was that BTS appeared on the stage without actually being there in person, thanks to hologram-like technology. A new article goes in-depth about how they pulled it off.
Source: How BTS Appeared as Holograms with Coldplay During ‘The Voice’ Finale