Rihanna refused to hang up her microphone on her night off in Germany when she headed to a karaoke bar in Cologne over the weekend (28-30Jun13).

The Umbrella hitmaker headed to the country ahead of her Diamonds World Tour concerts in Berlin and Hanover later this week (begs01Jul13), and she hit the town for a night out with her entourage.

Rihanna took to the stage at Cologne's Thai Royal Bar to indulge in some karaoke, and performed a mumbled version of No Doubt's Don't Speak before singing Sex on Fire by Kings of Leon.