Dannii Minogue had an emotional breakdown on the Australian 'X Factor' following the death of her grandmother.

The 41-year-old star who is a judge on the talent contest couldn't hold back the tears after her contestant Dami Im performed a rendition of Simon & Garfunkel's iconic hit 'Bridge Over Troubled Water' on Sunday night (29.09.13), following the death of Dannii's grandmother who lost her battle with cancer a fortnight ago.

After fellow judge LMFAO's frontman Redfoo's harsh critique of the performance - part of the Family Week theme - a teary-eyed Dannii dedicated the song to her dad Ronald, mother Carol Ann and her beloved grandfather.

She said: ''I had the roughest week ever. That was for my parents and my grandfather, that song tonight. I've had the toughest time.''

The other judges rallied around her in a bid to comfort the distressed star with 'Neighbours' actress Natalie Bassingthwaighte putting her arm around her, while Ronan Keating stood up and gave her a hug.

She continued: ''You have been my absolute angel and for anyone else out there who ever had a tough time that is the song, you need to connect the energy of the song.''

Dannii - the younger sister of Kylie Minogue, 45, who beat breast cancer - later posted a picture taken with Dami on her Tumblr page with the pair of them standing and smiling.

Attached to the image was a short post, she wrote: ''Dami's song this week, Bridge Over Troubled Water, was for anyone going through a tough time or anyone who needs to feel a little hope.''