When Worlds Collide: Stirling and Pentatonix Re-envision "Radioactive"
Stirling’s performance adds a frantic, driving urgency.
This cover succeeded because it leaned into the strengths of both acts:
Years later, this collaboration remains a fan favorite and a staple of "Best Cover" playlists everywhere. It’s a reminder of a time when YouTube was the wild west of musical innovation, and these two powerhouses were its undisputed royalty.