At Nintendo Live 2019, a small section of the Kyoto Mix concert was dedicated to K.K. Slider! The public could witness a projection version of K.K Slider singing a live acoustic version of the Animal Crossing: New Horizons theme.
For those who are unaware, Nintendo Live 2019 is an event which Nintendo holds which contains concerts, showfloor demos and video game tournaments. Kyoto Mix is a music concert which features projected versions of Splatoon characters singing & dancing to a live band which was shown on the 13th & 14th October. View the full Kyoto Mix Concert for Day 1 on YouTube, K.K Slider appears at 12:50.