How do you rescue Luigi on honeyhive on super Mario galaxy?

Luigi will eventually send you a postcard showing him stuck on a tree. He is stuck on Honeyhive Galaxy. Go to the first level (Bee Mario Takes Flight) which should show an empty star with a question mark on it. When you start the level, go to the fountain where there will be a large coin. Get the coin which will allow you to get a Bee Mario.Get the Bee Mario, and go up behind the big waterfall in front of the tunnel with those huge bugs in it. Do a high jump (Z + A) and start flying when you are in midair to the ledge above. If you make it to the top, kill the bug and Luigi will come down because he was scared of the bug.Then get the star. If my answer was not accurate, please tell me.