clown
princess
vampire
A Princess
There are many adult Halloween costumes available for adults in 2011. Please see the following website: www.costumecauldron.com/Adult-Halloween-Costumes.html
Jest Originals - 2011 Obama Halloween Costume Advice 1-5 was released on: USA: 19 October 2011
PIX News at 10 - 2011 Halloween Psychology What Your Costume Says About You was released on: USA: 28 October 2013
A quick web search shows one existed in 2011. You'll have to check around closer to Halloween.
Here are some websites that have family costume ideas: http://www.halloweenexpress.com/family-costume-ideas.php; http://familycrafts.about.com/cs/halloween/l/blhalcgroups.htm; and http://randomosityblog.com/2011/08/sibling-couple-and-family-costume-ideas.html
Halloween in 2011 was Monday, October 31st. Halloween is always celebrated on October 31st.
Halloween was on Monday, October 31st in the year 2011.
for girls either nikki minaj, witch, angel, cheerleader or anything simple for boys either batman, michael jackson or sumthin simple
Halloween Wars - 2011 was released on: USA: 2 October 2011