Which picture should I use?

[hider=Image 1]
[img=http://image.blingee.com/images19/content/output/000/000/000/7bf/778250815_768833.gif]
[img=http://oi40.tinypic.com/30cx8q0.jpg]
[img=http://auto.img.v4.skyrock.net/1907/80781907/pics/3110368479_1_3_50YYK1ED.png]
[/hider]

[hider=Image 2]
[img=http://data1.whicdn.com/images/86051591/large.jpg]
[/hider]

[hider=Image 3]
[img=http://kazasou.files.wordpress.com/2010/01/konachan-com-49152-animal_ears-breasts-catgirl-headphones-long_hair-open_shirt-panties-purple_eyes-purple_hair-twintails-underwear-white_panties.jpg]
[/hider]

[hider=Image 4]
[img=http://media-cache-ak0.pinimg.com/236x/93/2b/fe/932bfe3b1c7c8ebc51512e623adb89b6.jpg]
[/hider]

[hider=Image 5]
[img=http://i1210.photobucket.com/albums/cc415/LillithChristfoREVer296/Anime%20girls/Lucy_zpsae3dbce4.jpg]
[/hider]