New Super Mario Bros. U: Superstar Road-7 -- Lakitu! Lakitu! Lakitu!

Cloud-stealing is the name of the game here. There are several circling platforms to contend with and the easiest way to deal with them is to take a cloud and fly past them. The first set of platforms are green. In between them is the first Star Coin. The platforms will drop down to the level of the Star Coin, then the other ones will close in from above. Grab the Star Coin and wall jump out of there immediately. The next platforms are blue. Lakitu appears here to rain on your parade with Spinies, but the platforms are too low for you to reach him. The orange platforms to the right will allow you to take Lakitu's cloud and go flying. There are coin trails in the air. More and more Lakitu will appear, sometimes as many as three at a time. The trick is to keep transferring clouds so you can stay airborn. The second Star Coin is over some red plaforms. Swoop down to get it. The third Star Coin is partially visible, under a ledge. Use a cloud to get it. There's a hidden area above with coins. Keep going to the right and you'll see some green platforms in front of the flag. This opens the path to a Mushroom House.