The Walk (better than I expected) yesterday and noticed it used a French version of this tune. However, I was never actually aware of what the title was or who sang it--I only knew some of the lyrics.
My first attempted google search was Candy Girl, which I immediately remembered is a New Edition song--strangely enough the group I wrote about last week.
Attempt No. 2, Sugar, Sugar, nailed it. By the Archies, from 1969: