I finished it and stopped with 115 stars. The last five aren't worth the pain
Try "The last 127". You're not even halfway there man, and you're missing out on some of the greatest challenges in the game.
(highlight for spoilers)
I stand by my statement of "the last five." The rest are just busy work for kids with mean parents who won't buy them a new game to play. It's nice of Nintendo to give them something else to do, but I've got plenty of other stuff to play and I don't hate myself that much.