Halloween Hairstyles, Makeup and Costume Ideas For 2011. Your guide for getting ready for the 2011 Halloween season. If you plan on dressing up this Halloween, there are quite a few costumes and hairstyles to choose from. One of the biggest costume trends this season is honoring Michael Jackson and Amy Winehouse by dressing up like them. Which is perfect if you are a big fan. From the cast of Jersey Shore to Lady GAGA, look below to see the biggest trends for the 2011 Halloween season. Just try not to eat to much candy.