New Super Mario Bros. Wii Walkthrough Part 16: Sky Low

What's this sky level doing in a forest anyway? After going back down to earth for a trek through a castle, we end up at the mountain tops. o_O

Time Stamps:

0:00 5-5
5:23 5-Toad
6:10 5-Toad (again)
6:40 5-Castle

Enjoy!