From TMZ:
Rihanna violated karaoke etiquette at a bar in Germany this weekend — hogging the mic to yell and sing her way through TWO songs in a row — but it’s Rihanna so no one complained … duh.
It all went down at the Thai Royal Bar in Cologne … where a baseball cap-sportin’ Rihanna and a friend sang “Don’t Speak” by No Doubt … followed by “Sex on Fire” by Kings of Leon.
Rihanna’s currently on a world tour — and is scheduled to perform in Germany tomorrow night … so, kinda badass that she’s also hitting up karaoke bars and singing during her down time.