A song with an excellent example of what I'm asking about is Hello Seattle by Owl City (Spotify link). At the end of the song, the chorus is sung at the same time as a verse. Another example of this is at the end of Feeling This by blink-182 (Spotify link) (mildly not safe for work). More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.