Super Mario Galaxy 2 - Outside the Bonus Room Glitch

this glitch is hard to pull off all you do is be sure to the camera is facing with the silver star is on the right and go in front of it and flutter to the top of the tree and then infinite flutter forward and the bonus room pops about 5 minutes, ones you made it on top of the bonus room your free to roam and you can enter the room from the front.