Video game songs, singing or vocalized music, is nothing new. Metal Gear Solid, Kingdom Hearts, Final Fantasy, and Sonic the Hedgehog are some of the franchises that have had numerous, memorable songs over the years. Heck, Nintendo, known for their iconic gaming music, had a few songs of their own, such as the DK Rap, songs from K.K. Slider (if you want to count Animal Crossing characters speaking gibberish as vocals), Fire Emblem's Main Theme in Brawl, and the various songs from other media (i.e., the Super Mario Bros. Super Show opening, the Pokemon anime, Kirby's anime, the DKC cartoon..., etc.).
However, for the past several years (2013-present), Nintendo appears to utilize more music with vocals in their big games, whether it be a main theme or one of the tracks in the OST. Of course, that could be due to Nintendo attempting to adapt with the times in video game development (insert Nintendo and "adapting to the times" joke here, if you want). Nevertheless, some of them have struck a cord (no pun intended) with fans. Here are some of the more recent tracks.
Heritors of Arcadia - Fire Emblem Echoes: Shadows of Valentia
https://www.youtube.com/watch?v=CzKptJ9VIiE
Calamari Inkantation - Splatoon
https://www.youtube.com/watch?v=owtYx5xBfKU
Drifting Song - Xenoblade Chronicles 2
https://www.youtube.com/watch?v=30gxZOFJmNM
Jump Up, Super Star! - Super Mario Odyssey
https://www.youtube.com/watch?v=PhciLj5VzOk
Nasty Majesty - Splatoon 2 Octo Expansion
https://www.youtube.com/watch?v=K5ZU5ourdEE
Lifelight - Super Smash Bros. Ultimate
https://www.youtube.com/watch?v=t5ZJ4NJQ5aw
Lost in Thoughts All Alone (or if ~Hitori Omou~ in Japanese) - Fire Emblem Fates (showing the 25th anniversary concert live version here)
https://www.youtube.com/watch?v=cpUuXb0muwE
What are some of your favorite Nintendo songs in recent years, whether it be from the songs here or other songs from the noted or other Nintendo games?
