Which singer wrote songs that were No1 hits for The Monkees and UB40?

Neil Leslie Diamond (born January 24, 1941) is an American singer-songwriter, musician and actor. With 38 songs in the Top 10 on the Billboard Adult Contemporary charts, Diamond has sold more than 100 million records worldwide, making him one of the best-selling musicians of all time. On the Hot 100 and Adult Contemporary charts, he has had ten No. 1 singles: "Cracklin' Rosie", "Song Sung Blue", "Longfellow Serenade", "I've Been This Way Before", "If You Know What I Mean", "Desirée", "You Don't Bring Me Flowers", "America", "Yesterday's Songs", and "Heartlight".

"I'm a Believer" is a song composed by Neil Diamond and recorded by the Monkees in 1966 with the lead vocals by Micky Dolenz. The single, produced by Jeff Barry, hit the number-one spot on the U.S. Billboard Hot 100 chart for the week ending December 31, 1966 and remained there for seven weeks, becoming the last No. 1 hit of 1966 and the biggest-selling record for all of 1967.

"Red Red Wine" is a song originally written, performed, and recorded by American singer Neil Diamond in 1967. It is included on Diamond's second studio album, Just for You. The lyrics are sung from the perspective of a person who finds that drinking red wine is the only way to forget his woes. In 1983, UB40 recorded the best-known version of the song, in a lighter reggae style. The UB40 version topped the Billboard Hot 100 and the UK Singles Chart.