Super Mario 3D World Playthrough - World Star Complete All Green Stars &...

After punching feline reptile Bowser off the top of the building that looks like its from Donkey Kong we thought it was all over. We were about 50 levels incorrect. Log back into the game after you beat bowser, and you'll be at the start again, walk up to the Sprixies that you freed and they build you a rocket which takes you to this world, WORLD STAR. It's here that Rosalina is unlocked.