Beyonce and Kelly join in with unsuspecting fans singing Bey hit

Beyonce surprised unsuspecting fans who were singing her song during karaoke.

The 'Drunk in Love' hitmaker, who was with good friend and Destiny's Child band mate Kelly Rowland, stunned a group of girls in Miami on Tuesday night when she heard them singing 'Party', a hit from her fourth studio album '4', at a karaoke bar.