The first one you need to enter the room with the bubble frame On your map you might see 2 brown squares One of them is a secret room Crouch and jump to get there It is full af water so collect the red coins fast

Get Luigi and there will be 2 flowers It will make Luigi phase through the mirror There will be a door in the middle so go to the door in the middle The room will only have a star

There is a secret area Go to the Peach picture on the left It won't be hard

Go to Peach's playroom There is a picture on the left and it's a beach landscape Enter and collect all 5 silver stars Your pretty much done