Just Dance 3

Go into the menu and activate sweat points.

Pick a song that you can get a 5-star rating on with plenty of time to spare on normal difficulty. 5-star rating equals 10,000 points so if you are not sure find a song that you got well over 10,000 on.

I used "Are You Gonna' Go My Way" by Lenny Kravitz. The movements repeat and always come in the same order. They are also fairly easy with very little lower body movement. (I used this song for my perfectionist achievements as well, incidentally)

As soon as the 5th star lights up, I began to jump and flail my arms around and try to be as wild as possible. I was able to get about 352 sweat points. Also note that you can get sweat points both before you start and after you stop being graded for the movements.

I wasn't going for this but we got it in two player. We both got 5 stars but neither of us got 350 points, so it must have combined both our scores!!!

We used "Are you gonna' go my way' by Lenny Kravitz as per the solution above.

Don't forget to activate sweat points.