I thought that adding one more brooch to my collection wouldn't harm anyone... Anyone except this blondie. I am useless when it comes to DIY, mostly due to my chronic clumsiness, but this idea is just so easy, quick and simple that I could not ignore it. Some may find it bizarre, others may find it fun.
Procedure: behead the Barbie, style her hair as you like it (I thought about adding blood to it, probably inspired by Dexter, but it would look over-dramatic...) and pin it. As simple as it gets.
Sorry, Barb. You can always be Mattel's Marie Antoinette though.