Jennifer Lopez suffered every performer's nightmare at Wango Tango on Saturday night (May 14) when her entire sound system cut out during her live set. 

The 'On The Floor' singer was on stage and halfway through the track, which spent a couple of weeks at number 1 in the UK, when the power went out, but like a true professional she powered through and danced on without missing a beat. 

Addressing the technical glitch, JLo told the crowd:

"We ain't gonna let that get us down right? No, baby! Nobody keeps momma down."

"This is what show business is all about, baby. Man, oh man. Who's getting fired tonight?! Somebody's getting fired tonight!"

Watch the dramatic moment unfold here: