Keith Urban found the death of his father-in-law "huge".
The 'American Idol' judge and his wife Nicole Kidman - with who he has daughters Sunday, six, and Faith, three - were left devastated in August when Dr. Antony Kidman passed away suddenly and the country crooner admits he has found it hard without the beloved family member.
He said: "The loss of Nic's dad was huge. I can't even describe what that moment was like for our family. I was very, very close to Nic's dad."
Antony's death caused Keith to miss shooting 'American Idol' auditions in New York and he was very grateful to have such "amazing" support, both from the staff on the show and his fans.
He told reporters on a conference call: "Adam Lambert stepped up and filled in for me. It was an amazing thing to see that support. I am very grateful, and I don't take those things for granted. You would think people would have a heart.
"When I saw it in action with all of the network at FOX and all of the people involved with 'Idol', and then of course my fan base, it was an extraordinary thing."