British singer Adele is reportedly snubbing Bob Geldof after he invited her to take part in this year's Band Aid 30 Ebola charity single.
An ensemble of current recording artists signed up to perform, but Adele didn't want to know and instead made a donation to the charity.
Geldof said he had asked the 26-year-old performer to join the star-studded line-up for the 30th anniversary edition of Do They Know It's Christmas, but had no response.
"Adele is doing nothing," he said.
"She's not answering the phone... she doesn't want to be bothered by anyone.
"She won't even pick up the phone to her manager.
"She's bringing up a family, you know.
"Some people just don't want to do it."
A spokesperson for Adele said: "Bob Geldof and the organisers spoke directly with her management but at no point was she confirmed.
"Adele is supporting Oxfam's Ebola Appeal with a donation."
Adele has been keeping a relatively low profile in recent weeks.
She is understood to be in America working on a new album and has not updated her Twitter account since October 30.
Do They Know It's Christmas, written by Geldof and Midge Ure, was first released in 1984, and raised millions following famine in Ethiopia.
The lyrics have been modified to reference Ebola, which has recently claimed the lives of more than 5,000 people, mainly in West Africa.
The single featuring Ed Sheeran, One Direction, Rita Ora, Sinead O'Connor, Seal, Sam Smith, Chris Martin, Bono and Paloma Faith, among others, was revealed on last night's X Factor results show.
So Adele isn't singing on Band Aid 30. So what? She has good reason: 1. She's based in Los Angeles. 2. She's reportedly working on a tight deadline for her new album, due for release at Christmas. 3. She has a baby to take care of.
What's more, she has made a donation to the Ebola relief fundraiser.
Bob Geldof should have said he wasn't able to contact her and left it at that. Instead, by making remarks like "she doesn't want to be bothered by anyone", and "some people just don't want to do it", he has set her up for a right dissing.
It's doubtful whether Chris Martin of Coldplay and Bono would have taken part if they were busy recording their own albums in time for Christmas.
Band Aid 30 is good timing, particularly for Bono, who's hot on the publicity trail for U2's new album, Songs Of Innocence, a crucially important one for the band after their last poorly received offering.
To be fair to him, he is a good friend of Geldof, but show-off that he is, I'm sure he also wouldn't have liked anyone else singing that big line of his from the original Do They Know It's Christmas (changed now to the duller, Well Tonight We're Reaching Out and Touching You.
It is, of course, overly cynical to accuse the whole 20 acts taking part of doing so for their own publicity purposes, but it's not going to do them any harm at all.
With estimated royalties of £30m a year - even though she hasn't released an album in three years - Adele doesn't need the publicity.
Regardless, she shouldn't be judged for her no-show, especially when she has quietly made a donation.
There was a distinct lack of female vocalists in the recording session of the original Band Aid single.
This time, Geldof says he has secured "the best female voices in the country" in Ellie Goulding, Emeli Sandé and Paloma Faith.
"There are voices here that are at least parallel to Adele. Sam Smith is her male equivalent."
Ouch. There's nothing quite like a Geldof scorned.
It's easy to be cynical about millionaire musicians and their charity projects. After all, if the likes of Bob Geldof, Bono and Paul McCartney - whose collective wealth tops a billion quid - were to empty their own coffers, it'd pay for a hell of a lot of food parcels or Ebola relief.
But doing something - anything - is always better than doing nothing, and charity isn't just about money, anyway.
As one of the UK's biggest stars, Adele's participation in Geldof's latest incarnation of Band Aid would certainly have helped raised awareness of the plight facing West Africa amongst her millions of fans, and possibly even changed some of their attitudes.
And with reality TV 'star' Amy Childs recently mistaking Ebola for a new boy band, anything that educates the seemingly increasingly ignorant Western youth about the problems facing the wider world is desperately needed.
Adele's reasons for snubbing the Boomtown Rats vocalist haven't been made public.
It's true that today's musicians are less likely to be easily led - whether by corrupt managers, greedy record companies or indeed bullish charity organisers - and Adele has no doubt considered her decision.
Perhaps with 30 million records sold - and by all accounts a sizeable donation made to Oxfam's Ebola appeal - she feels she doesn't need to dance to Geldof's tune or maybe she has issues with the accusations of financial impropriety that have dogged some of the fundraiser's past projects.
But how hard would it have been for her to leave her mansion for an afternoon and belt out a couple of lines?
If having to spend time with the likes of Bono, Sinead O'Connor or Chris Martin was the problem, I'm sure they could have staggered the recording sessions.
Geldof has remarked that Adele "is doing nothing" by refusing to take part, while Phil Collins has branded her "a slippery little fish".
It is a disappointment that the multi-millionaire diva from a humble background herself couldn't just have banded together in aid of the greater good.