First recorded by Katrina & the Waves (1983).
Hit version by Katrina & the Waves (US#9/UK #8/CAN #3/IRE 2/AUS #4 1985).
From the wiki: “‘Walking on Sunshine’ was written by Kimberley Rew for Katrina & the Waves’ 1983 debut album of the same name. The band recorded – at their own expense – an LP of their original material designed to be sold at gigs. The album was shopped around to various labels, but only Attic Records in Canada responded with an offer.
“Consequently, although Katrina & the Waves were based in England, the first album, Walking On Sunshine, was released only in Canada. The title track garnered enough critical attention and radio play (especially for the title track) to merit a Canadian tour and a follow-up album in Canada (Katrina and the Waves 2, in 1984).