Louis Walsh makes Dannii Minogue cry after mocking her pop career

Irish music mogul Louis Walsh made his fellow 'X Factor' judge Dannii Minogue cry on live TV after mocking her turbulent pop career.

Louis, 55, made the vicious jibe to the Aussie pop princess, 33, when she criticized 'X Factor' contestant Niki Evans, the dinner lady who Walsh mentors on the show.

The "I Begin to Wonder" star claimed that Evans was out of tune, but Louis hit back by saying: 'Dannii, singing out of tune? Ho ho!'"

During an commercial break, Dannii is reported to have stormed out of the X Factor studio sobbing.

"Louis keeps joking about Dannii's singing talents and it's really getting to her," a source tells British newspaper The Sun.

Danni didn't return to the set following the break, so fellow judge Sharon Osbourne, 55, covered up the incident by clambering onto Simon Cowell's lap.