Tony Bennett has led tributes to the late Frank Sinatra Jr.
The singer - the son of Frank and Nancy Sinatra - passed away at a hospital in Daytona Beach, Florida, on Wednesday (16.03.16) at the age of 72 after suffering a massive heart attack.
Following his death numerous stars from the world of music and television have remembered the performer - affectionately known as Frankie - who carried on his father's musical legacy while also carving out his own successful music career.
Tony, who was extremely close to Frank Sinatra and was inspired by him musically, took to his Twitter account to write: "I am deeply saddened to hear of the passing of Frank Sinatra Jr. and send my sympathy to Tina and Nancy and the Sinatra family (sic)"
His sister Nancy took to her Facebook page to announce the news.
Her statement read: "The Sinatra family mourn the untimely passing of their son, brother, father, uncle, Frank Sinatra Jr. of cardiac arrest while on tour in Daytona, Florida. January 10, 1944 - March 16, 2016. Sleep warm, Frankie."
His stepmother Mia Farrow - who was married to his father between 1966 and 1968 - also sent her condolences.
She wrote on her official Twitter account: "Condolences to the Sinatra family. RIP Frankie (sic)"
'Family Guy' creator Seth MacFarlane - who portrayed Frankie on the adult animated TV series - admitted he was "grateful" to have known him.
He wrote: "Frank Sinatra, Jr. was a friend to 'Family Guy', and a friend to me. I'm sadden at this passing, but grateful to have known him. RIP, Frank (sic)"
American chat show legend Larry King "admired" him for living up to the expectation of his father's name.
He wrote: "I always admired Frank Sinatra Jr. He was born with a hard name to live up to, but I loved his talent and his ability to be forthright (sic)"
Frank Jr. worked for his 'Fly Me to the Moon' crooner father as his musical director and conductor, until he died in 1998 at 82 from a heart attack.