Keith Urban says achieving a number one is like hearing ''I love you''.

The country crooner can't believe he is still hitting the top of the charts after 21 years but he admitted he still gets a thrill out of his success.

Speaking on the Billboard Chart Beat Podcast about his latest album 'Graffiti U', which topped the charts in May, he said: ''''It's an amazing feeling, absolutely,'' Urban says of hitting No. 1. ''It's like hearing, 'I love you.' ''

And Keith has praised his record label Capitol Records for supporting him throughout his career.

He said: ''I love that I still get to do what I love to do. Capitol [Records] and I have been together a long, long time; I signed in 1997. So, to still be there 21 years later is extraordinary. It's a testament to how supportive the label has been of me and my music and where I'm interested in going with it.''

Meanwhile, Keith has previously praised his wife Nicole Kidman for encouraging him to take more risks.

The 50-year-old singer says he has his 51-year-old wife to thank for encouraging him to give everything a go, even if it doesn't turn out how he had hoped.

Keith said: ''The way I approach it now is, 'Let's do it. We can scrap it after the fact.' I learned that from my wife. Try anything, do anything, it'll be very apparent if it sucks. But I have to try it. I would never have discovered [certain ideas] if I hadn't dared to suck.''

And Keith previously admitted he cannot bear to be apart from Nicole for a week and they try to make plenty of plans in advance because they don't like being away from each other for more than ''a handful of days''.

He said: ''We never made a promise to each other. I just don't want to be away from her for two weeks or [even] a week. We try and schedule pretty much everything so that we're not away from each other for more than a hand full of days. Even when she was shooting 'Lion' in Australia we just relocated down to Tassie for a few days and wherever else we had to go so we just stay together as a family it's really important to us.''