All three of these pieces are from previous tutorials. Take a new look.
Sweater Upcycle: I did add a piece of lace to the bottom to give the appearance of a bit more length.
Ruffle Leggings: Ruffle fabric is easy to find online and in stores like Hobby Lobby and JoAnns. It runs about $10 per yard most anywhere. It sews like any knit fabric.
Floral Headband: I used a few tutorials in this headband. The two rolled flowers and the headband are from this tutorial. The larger flower is a mix of silk and sweater made like this tutorial.
This outfit cost $12 ($10 for the ruffle fabric, $1 for the sweater, and $1 on the extras) and took me less than an hour.