Finding songs for class can be a tricky thing. Especially the warm-ups!
I like this easy going mid-tempo song from Jennifer Hudson and R Kelly. It’s fun and “riffy” at the end, but I think I’ve made it work.

[youtube https://www.youtube.com/watch?v=vInoJbv76TU?list=UUXK4kyVDTmnKGS5Fs0n271A&w=1280&h=720]