order them from best to least best

circus:
http://farm4.static.flickr.com/3414/3476925475_d23cebb2b1.jpg

womanizer outfit:
http://britneyspearsblackout.com/wp-content/uploads/2009/03/b-cop-t-1.jpg

Radar outfit:

http://britneyspearsblackout.com/wp-content/uploads/2009/05/gbritney_spears_2009_circus_tour_2.jpg

touch of my hand outfit:

http://britneyspearsblackout.com/wp-content/uploads/2009/06/g-britney-split-new-costume.jpg

me against the music:
http://www.costumzee.com/view/wp-content/uploads/2009/06/britney-spears-circus-tour-5.jpg

Boys:

http://www.accesshollywood.com/content/images/87/230×306/87830_britney-spears-performs-during-the-circus-starring-britney-spears-tour-at-americanairlines-arena-on-march-7-2009-in-miami.jpg
get naked:

http://www.mamapop.com/.a/6a00d8341c5d9653ef0115721b8972970b-300wi

freakshow:

http://www.britneyspears.com/2009/07/exclusive-pics-berlin.php?bfm_index=4&bfm_page=0