Alistair Ian Campbell (born 15 February 1959) is an English singer and songwriter who was lead singer of the British reggae band UB40. As part of UB40, Campbell sold over 70 million records worldwide and toured the globe for 30 years. In 2008, Campbell left UB40 due to a dispute with band management and embarked on a solo career. In 2012, Campbell was announced as one of the three judges on the panel of the TV show New Zealand’s Got Talent. In August 2014, Campbell announced he had reunited with former UB40 bandmates Astro and Mickey to record a new album, Silhouette, released on 6 October 2014.

Alistair Ian Campbell was born in Birmingham, England. He is the brother of former bandmate Robin Campbell and former UB40 frontman Duncan Campbell, and is a son of the late Scottish folk singer Ian Campbell.