Cilla Black told close friend Barbara Windsor she had "not been felling well" in the weeks before her death.
The former Eastenders actress told Good Morning Britain Cilla had complained of "aches and pains" but laughed it off.
Windsor said despite "old age creeping in" Cilla always looked immaculate whenever she saw her.
"I always used to say to her, but look at us, we don't look it do we? We look in our forties dear.
"It was lovely to have seen her in the last couple of weeks. I'm really sad today."
Christopher Biggins has revealed he last spoke to close friend Cilla Black 10 days ago and they had made plans to go on holiday together next month.
The actor, who co-hosted Surprise Surprise with Cilla in the 1980s, told Good Morning Britain the pair had planned a trip to Barbados in September.
He said: "I spoke to her 10 days ago. We had not seen each other for a little while.
"She'd had bad arthritis and her hearing was not good which meant it was difficult to talk on the phone.
"But we said we'll meet in September. She said why don't you come to Barbados and we'll arrange that."
Biggins said the loss of Cilla was "terrible for everyone" and called her "the people's sweetheart".
He said: "She was so loved. Everybody adored her. I think that's why everyone is in such grief now. It really is a sadness that everybody is being affected by. It's a bit like Princess Diana dying."
Cilla Black may have fallen over shortly before she died at her Spanish holiday home, it is reported.
Medical examiners found marks on her right arm and elbow which suggest she may have had a "dizzy turn", according to The Sun.
The TV star's body is said to have been discovered by her son Bobby who the newspaper reports broke her bedroom door down when she failed to rise after an afternoon nap.
Paramedics arrived at the Costa Del Sol property around 6pm on Saturday but there was nothing they could do to save her.
A post-mortem is due to take place today but it is thought it could take several weeks for the results.
The Greek stock market has reopened after a five-week shutdown amid the country's financial crisis, with stock prices falling sharply.
The main index was down nearly 23 per cent in early trading.
National Bank of Greece, the country's largest commercial bank, was down 30 percent, which is the daily limit.
Trading on the Athens stock exchange was suspended late in June as part of capital controls imposed to stem the flow of money out of the country.
Dale Winton has spoken out for the first time since Cilla Black's death saying she was the "most loyal person a friend could have".
The TV presenter famously had a long-standing friendship with Cilla and the pair often holidayed together.
He told ITV News he was "too upset to speak" on camera but released this statement saying he was "truly saddened and shocked" Cilla had gone.