Super Mario Galaxy help

How do I get the Hidden Star for Freezy Flame Galaxy?

The first step you take in getting there from the normal area is to triple jump as Ice Mario up those two water fountains that have the 1-up above them, up on a ledge above the water at the bottom of the level. There's a higher ledge that you can reach from the higher water fountain with the last jump in the triple jump.

Just go to the very top then slide down the right slope until you come to a ledge that holds a spin star -- it'll shoot you even higher. I think you can figure the rest out (Most epic secret ever)