BBC
Tony Bennett was "singing at his piano" just days before he died, his representatives have revealed.
The legendary New York pop and jazz singer died on Friday aged 96.
A statement posted on his Twitter account said: "Tony left us today but he was still singing the other day at his piano and his last song was Because of You, his first #1 hit.
"Tony, because of you we have your songs in our heart forever."
Sir Elton John, Carole King and Hilary Clinton were among those paying tribute to the star on social media.
Bennett was known for songs such as The Way You Look Tonight, Body and Soul and (I Left My Heart) In San Francisco.
He also collaborated with star performers from Lady Gaga to Aretha Franklin and Frank Sinatra, who called him "the best singer in the business".
During a career that spanned eight decades, Bennett sold millions of records and won 20 Grammys, including a lifetime achievement award.
Bennett's death was confirmed by his publicist Sylvia Weiner in a statement to the Associated Press.
She said he died in his hometown of New York. No specific cause of death was announced, but Bennett had been diagnosed with Alzheimer's disease in 2016.
Sir Elton John led the tributes on social media, writing in a statement posted on his Instagram that he was "so sad to hear of Tony's passing".
"Without doubt the classiest singer, man, and performer you will ever see," Sir Elton said. "He's irreplaceable. I loved and adored him. Condolences to Susan, Danny and the family."
The White House released a statement saying that "Tony Bennett didn't just sing the classics - he himself was an American classic" and praising his enduring contributions to American life.
Former US first lady Hillary Clinton described Bennett as a "true talent, a true gentleman, and a true friend". She tweeted: "We'll miss you, Tony, and thanks for all the memories."
Singer Carole King said: "RIP Tony Bennett. Such a big loss. Deepest sympathy to his family and the world."
In a statement to Rolling Stone, singer Billy Joel said: "Tony Bennett was the one of the most important interpreters of American popular song during the mid to late 20th Century.
"He championed songwriters who might otherwise have remained unknown to many millions of music fans. His was a unique voice that made the transition from the era of Jazz into the age of Pop.
"I will always be grateful for his outstanding contribution to the art of contemporary music. He was a joy to work with. His energy and enthusiasm for the material he was performing was infectious. He was also one of the nicest human beings I've ever known."
Director Martin Scorsese added: "Tony Bennett was a consummate artist. All you have to do is listen to any one of his hundreds of recordings to recognise that.
"Very early on, his music quietly wove itself into the fabric of our lives. His voice felt as familiar and as close as the voices of our loved ones. I know that this was true for millions of people around the world."
The legendary New York pop and jazz singer died on Friday aged 96.
A statement posted on his Twitter account said: "Tony left us today but he was still singing the other day at his piano and his last song was Because of You, his first #1 hit.
"Tony, because of you we have your songs in our heart forever."
Sir Elton John, Carole King and Hilary Clinton were among those paying tribute to the star on social media.
Bennett was known for songs such as The Way You Look Tonight, Body and Soul and (I Left My Heart) In San Francisco.
He also collaborated with star performers from Lady Gaga to Aretha Franklin and Frank Sinatra, who called him "the best singer in the business".
During a career that spanned eight decades, Bennett sold millions of records and won 20 Grammys, including a lifetime achievement award.
Bennett's death was confirmed by his publicist Sylvia Weiner in a statement to the Associated Press.
She said he died in his hometown of New York. No specific cause of death was announced, but Bennett had been diagnosed with Alzheimer's disease in 2016.
Sir Elton John led the tributes on social media, writing in a statement posted on his Instagram that he was "so sad to hear of Tony's passing".
"Without doubt the classiest singer, man, and performer you will ever see," Sir Elton said. "He's irreplaceable. I loved and adored him. Condolences to Susan, Danny and the family."
The White House released a statement saying that "Tony Bennett didn't just sing the classics - he himself was an American classic" and praising his enduring contributions to American life.
Former US first lady Hillary Clinton described Bennett as a "true talent, a true gentleman, and a true friend". She tweeted: "We'll miss you, Tony, and thanks for all the memories."
Singer Carole King said: "RIP Tony Bennett. Such a big loss. Deepest sympathy to his family and the world."
In a statement to Rolling Stone, singer Billy Joel said: "Tony Bennett was the one of the most important interpreters of American popular song during the mid to late 20th Century.
"He championed songwriters who might otherwise have remained unknown to many millions of music fans. His was a unique voice that made the transition from the era of Jazz into the age of Pop.
"I will always be grateful for his outstanding contribution to the art of contemporary music. He was a joy to work with. His energy and enthusiasm for the material he was performing was infectious. He was also one of the nicest human beings I've ever known."
Director Martin Scorsese added: "Tony Bennett was a consummate artist. All you have to do is listen to any one of his hundreds of recordings to recognise that.
"Very early on, his music quietly wove itself into the fabric of our lives. His voice felt as familiar and as close as the voices of our loved ones. I know that this was true for millions of people around the world."