Cilla Black's death was confirmed by her publicist Nick Fiveash on Sunday afternoon.
Sir Bruce Forsyth said he still thought of Cilla Black as a 'kid' and that he couldn't believe she had died aged 72.
The TV presenter and entertainer said Cilla had a "common touch" and was loved by everyone.
Sir Bruce, 87, told ITV News: "Bobby will be there to meet her, she never really got over Bobby her husband leaving when he did.
"What a lovely performer, what a lovely lady and we're going to miss you."
Prime Minister David Cameron has described Cilla Black as a "huge talent" following news of her death.
Sir Cliff Richard said he will miss his "outrageous" friend dearly.
"Some people will always be with us and Cilla is one of those people," the singer said.
"I will always think of her as outrageous, funny, incredibly gifted but above all full of heart.
"She was a very special person, and I have lost a very wonderful friend, I will miss her dearly. God bless her."
Coronation Street star Les Dennis tweeted that he was "shocked and saddened" by the news.
Comedian Jimmy Tarbuck also paid tribute to Black, who he had been friends with for more than 50 years.
He said: "She was Liverpool's Cinderella, and she did go to the ball. What a career."
Friend and fellow presenter Christopher Biggins, who starred alongside Cilla Black in Surprise! Surprise!, described the entertainer as a "national treasure".
He said that news of her death in Spain was "really devastating".
The Foreign Office is aware of reports that a British national, believed to be iconic TV personality Cilla Black, has died in Spain.
A Foreign Office spokeswoman said: "We are aware of reports of the death of a British national in Spain."
Hollywood actor Russell Crowe has paid tribute to Cilla Black who has died aged 72, according to reports.
In a messsage posted to Twitter, he said: "Thanks for everything Cilla. A loving life loved in the living of it".
Stars have been taking to Twitter to pay tribute to singer and legendary TV presenter Cilla Black, who has reportedly died in Spain, aged 72.
Actress Joan Collins said she was "sad and shocked by the news", adding that Black was a "resplendent and rare talent".
TV host Piers Morgan, who interviewed Black on ITV Life Stories, said she was a "great star" who has now been reunited with "her Bobby".