Not too hawt with the Jackie O. tie, but LOVE the Urban turban and the Bow tie; all are very easy. Make sure as said in the video that it's a square scarf. It's easy to get a good cute scarf at Forever 21, its 8 dollars but worth it because it's so big it can sub for a blanket. >:) Another good place to find cheap scarfs is thrift shops, the cheapest but in my opinion is the treasure chest of misplaced GLORIOUS clothes if you look beneath the surface of course.
I already have a few of these in my closet. I love them but they're a pain with bras. Make sure that you have a strapless bra or one of those wonderful Victoria Secret multi-way bras in those cute patterns. They come in multiple styles like total Crotcheted back or Racerback style.