The bowhead whale has a life span of over 200 years, longer than any other mammal. They sing love songs to attract mates, and it's unclear whether males, females or both do the singing. The bowhead whale can sing with two voices at a time (perhaps creating solo harmonies and solo countermelodies!). And for each year, each mating season, they change it up a bit, create a new song to intrigue and beckon the new mate.

University of Copenhagen (2009, August 3). Love Songs Of Bowhead Whales: Whales Sings With 'More Than One Voice'. ScienceDaily.