TV presenter Graham Norton has admitted that he would love to get Madonna as a guest on his chat show - and would devote the whole show to her if he did.

Graham - who is also currently hosting Over The Rainbow on BBC1 - described the singer as the "Holy Grail" of talk show guests.

"If we're on the air long enough, hopefully there will come a day when she'll come on," he said.

"Essentially it's because I'd like to meet her, it's as simple as that. I've never met her and I'd like to.

"In her case I think you'd do a special," he added. "I think you'd have to do a special just with her, maybe with other people along the way but it would be the Madonna show. If Glee can give up their show for her then I'm sure I can."

Recent guests on The Graham Norton show have included Hollywood actress Jennifer Lopez and funnyman John Cleese.

"We always aim to have good people on, that's our plan," Graham said. "Some weeks are easier than other weeks. It does help to have that star power to kickstart the evening."

Madonna's brother has claimed that he would be a good judge on American Idol.

Christopher Ciccone, who is hoping to replace Simon Cowell, has launched a Facebook page to promote his cause and currently has just over 600 supporters.

"I think I can bring a particular kind of credibility to the show," he told the New York Post. "I'd be the only person sitting at the table who actually created a popstar from the beginning, and helped keep her there for 20 years. I know what it takes to make it."

Ciccone also dismissed his rumoured competitors, including DJ Howard Stern and gossip blogger Perez Hilton.

"I think Howard is a great guy but it's difficult to see him sitting there, with the demographic he brings to the table," he explained. "And I know producers are talking to Perez, although he's probably the only person who doesn't realise how irrelevant he is."

Ciccone claimed that Madonna would be "supportive" if he joined the panel and concluded: "I really love the show. It's become part of the American dream."

Earlier, Fox claimed that it will ensure Cowell's replacement is "credible".

Madonna singing live for Live Aid 1985: