Check out this fun list of the hottest summer songs (and their videos) since 1975

Every summer has its hottest pop hit, or its number one "song of the summer," as Insider puts it. And as we step into summer 2021 without yet knowing what this year's top tune will be, Insider has referred to Billboard's charts to compile a nostalgic list of history's number one summer songs from 1975-2020. — Read the rest