How do i unlock the pipe in world 5-B of new super Mario bros?

Answer 1

You go to world 5 ghost house and keep going up until you reach the long staircasethen jump on the three bricks next to it,then hit the three secret bricks above it,after that go to the top secret block crouch and jump at the same time.It should sprout a climbing plant that you climb to a secret door that will unlock you world five cannon witch goes to world 8