On the Purple Rain tour, this was a showcase song for Sheila E., who served as Prince's opening act and also joined him on stage. Her live percussion on "I Would Die 4 U" compensated for the beats that couldn't be generated outside of the studio.
It’s obviously always a great time to watch Prince perform this song live: https://youtu.be/SVEFRQavTNI
Thanks to the listener who sent in pictures of kitties Alexander Hamilton and Aaron Furr -- "they need a dance party at 5. They are sleeping on the job!!"
This song with its iconic dance was the final top-10 hit from Purple Rain -- and it's been covered by artists including Mariachi El Bronx, While Lies, and a famous live cover by Chvrches, called "I Would Die 4 V"