Ronan Keating has been spotted in Sydney, Australia back in the good books with wife Yvonne.

The couple split in May after it was revealed that Ronan, 33, had been having a seven-month affair with 26-year-old dancer Francine Cornell.

But their marriage is clearly back on track as Yvonne, 36, flew to Australia to be with husband, Ronan, who is on the judging panel of the Aussie version of the 'X Factor'.

Meanwhile, to mark the anniversary of the death of Boyzone member Stephen Gateley, Ronan reunited with his Boyzone pals on the 'X Factor' to sing a tribute song.

And the Irish singer also posted on his Twitter page last week: “Hey all, thanx again for all your support today....Miss him So much. Can't believe it's a year. X”

The UK Boyzone tour kicks off on 21st February 2011.

Watch Ronan Keating on Australia's 'X Factor' show below: