I love this hair style at the minute, it is so quick and easy to do and it looks like you have taken a lot of time on your hair. I got my doughnut really cheap from Primark, they have loads of different sizes and colours, I got a dark brown large one as I have quite long hair.
To achieve this look I put my hair in a high pony tail, then put my doughnut half way up it and tucked the ends of my hair under the doughnut. Finally I rolled the doughnut down my ponytail and just did some little adjustments, I used no hair grips to secure it into place and it stayed in all day and didn't move, however you can use them to make this a bit more fixed. It's as simple as that.
Have you used a doughnut before?