First of all, F**K THIS GAME. Add this title to the list of terrible Kinect games. The overall game ratio might be rather small, but this game can be tricky. I don't think many people would complete it except that this final achievement is worth 200GS and to get it you only need to score just a little bit better on one song, but it is tough! Read on to see how I got it.
Getting 150 stars is the most difficult achievement in the game. You need to 5 star each routine and chant, 30 total. You can at least 4 star every song in the game probably on your first try. Getting 147/150 stars is super easy, because you'll typically 5 star each event on the first or second try. Getting stars 148 and 149 may give you a little trouble, but they are do-able. For me, the Disturbia routine on easy and the Mickey routine on hard took more than a few tries (You can 5 star Mickey on easy, but this is probably the one routine you'll want to 5 star on hard for the other related achievement).
The last star that was most difficult for me and everyone else was the fifth star on Shake It on easy difficulty. I read through the other solutions, but my problems weren't with my dance moves. I'm not a cheerleader or a professional dancer, but I can tell you that I was spot on for the majority of the moves which should have been enough for 5 stars. No, I think the problem was more mechanical and had more to do with the angle of the Kinect sensor than anything. Try this stuff out if you just can't seem to 5 star Shake It:
You NEED to be able to get perfect ratings on your Blade Claps. You need the multiplier bonus a perfect rating grants and you need to use it for successive moves. You retain your multiplier as long as you don't miss a move. The problem with this song is pretty much any move that requires you to cross your arms in front of your body will be missed. The game just can't pick it up for some reason. So you need to start off a multiplier on your Blade Claps as soon as you can and you need to hold on to it for as long as you can. If you can at least perfect most of your Blade Claps and get an 'okay' rating on your other moves (green flash on your cheerleader) you should be okay.
So what do you do if the game just will not pick up your blade claps? Here's where I messed around with the Kinect Sensor. I noticed that the Kinect was just not picking up my feet very well. On the camera window towards the bottom of the screen in the center I saw the Kinect was seeing my head, torso, hips, and upper thighs, but my feet seemed to be cut off a bit. So I took a thin object (had my checkbook handy) and I stuck it under the back of the Kinect sensor pedestal to tip it forward ever so slightly. Once I did this I started getting perfects on my blade claps. Not sure why it was just this song that was giving me trouble, but it worked for me. You may have to adjust yours more or less, up or down, but just keep adjusting until you can start getting perfects on your Blade Claps.
One other thing I did was quit out the game and picked it up again a few hours later. I'm not completely sure, but I guessed maybe the game was lagging or running slow due to some cache-related issues. Perhaps the calorie tracking was overflowing somewhere or something. It may have helped me to calm my nerves and get a little rest, too, but I felt it helped just to give it a break. If you're getting nowhere, just turn off the Xbox and try again later. Also, for a fun little treat, dump your calories burned in to Kinect Playfit to get a little closer to this achievement:
After all was said and done I burned 605 calories in Let's Cheer, which also counted for this one:
So there's that little extra incentive you might need. I hope this helps you brave lot who decide to attempt completing this game. It wasn't easy, but despite everything this was actually a quick game to complete 1000/1000. Here's a little parting screenshot to let you know it can be done:
One other note: You can get 5 stars on any difficulty. Your rating will be the the highest star count for whatever difficulty you complete it on. Cheers.