Most Annoying Levels in New Super Mario Bros. Wii

Ah, NSMB Wii. A really fun game, but it can be really annoying at times, especially in these levels. Please feel free to comment your experiences with these levels and add levels that you think are annoying.
The Top Ten
1 World 9-7
2 World 8-Bowser's Castle
3 World 7-Castle
4 World 8-3
5 World 9-4
6 World 9-8
7 World 8-7
8 World 6-6
9 World 5-4
10 World 8-4
The Contenders
11 World 4-4

Oh my gosh! Those bloopers and cheep cheeps are so annoying!

12 World 8-1
13 World 8-5
14 World 2-Castle
15 World 5-Tower
16 World 6-Airship
17 World 8-Airship
18 World 7-Tower
19 World 3-4

I don't like how you are forced to go to the red flag, then after unlocking the ! switch, you have to play it again to unlock the castle.

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