New Super Mario Bros. Wii Walkthrough Part 12: Ninety-Nine!

I'm not even halfway done with the game and I got 99 lives, lol! well, as they say: It's not how many lives you have, it's how many you use that determine a game's difficulty.

Edit, because "some" people are too impatient to hear the answer as to why Mario loses his hat in a later part when I got it, it IS because you get 99 lives. They made it an easter egg for life collectors or those who are just generally good at the game.

Annotation corner:
10:01 To those wondering where Mario's hat is: When you have 99 lives, it is taken off. A fun thing for completionists!

Time stamps:
0:00 4-4
9:23 4-Ghost House

Enjoy!