With over 750 million plays on Spotify at the time of writing, Katrina and the Waves' 'Walking on Sunshine' is among the biggest songs of the 1980s. Featuring the vocals and guitar of Katrina Leskanich, it's the perfect distillation of happiness. "It's an occasion song, so when the sun shines, or it's a party, it's a feel-good thing", says the singer as we sit down for a chat. Previewing her appearance at Rewind Festival in August, we caught up with the American-born, UK resident for a chat about the recording of the monster track, her unlikely connection to Ozzy Osbourne, and nostalgia for "ugly dad dancing". Back for the weekend; Eamon O'Neill.