First recorded by The Pathfinders (1967).
Also recorded by Bobby Rydell (1968), December’s Children (1968).
Hit versions by The Marmalade (UK #6 1968), The Grass Roots (US #49 1969).
https://youtu.be/_aF4ty0XP-k
From the wiki: “‘Lovin’ Things’ was co-written by Artie Schroek and Jet Loring, and first recorded for commercial release in 1967 by the Scottish band The Pathfinders. A version by Bobby Rydell was put out as a 45 rpm on the Reprise label in January 1968. Then, in April 1968, UK group The Marmalade released their cover recording and took it into the UK Top Ten. Later that year, US group December´s Children also covered ‘Lovin’ Things’ with a somewhat different orchestral arrangement but with no apparent chart success. “Lovin’ Things” finally became a Billboard Hot 100 hit in the US when The Grass Roots covered it in early 1969.”