Tributes have been paid to US singer Andy Williams, who has died aged 84, a year after being diagnosed with bladder cancer.

The star, whose version of Moon River made him world-famous, won fans with his easy-listening style and smooth vocals.

DJ Tony Blackburn said he had "so many great songs".

Writing on Twitter, he said: "One of the best concerts I ever went to was Andy Williams at the Royal Albert Hall many years ago, he was tremendous."

Williams started singing with his brothers as a child and had more than 20 hit singles over 50 years including Music To Watch Girls By and Can't Take My Eyes Off You.

His hit re-recording of Can't Take My Eyes Off You saw him team up with Denise Van Outen, who said he was "a true gentleman".

"He was one of the kindest, sweetest and most generous people I have ever met. He had such amazing presence, incredible energy and was never affected by fame or success."