Step it up, Beliebers.
During a recent performance in Spain, an annoyed Justin Bieber stopped singing "What Do You Mean" to insist that the audience clap on beat. Once he straightened everyone out (starts around 2:18 in the video), he returns to performing.
Bieber's has had some curious incidents during live appearances of late, most recently storming off stage after rowdy fans spilled water and wouldn't listen.