How do i get the skin of a friend for a wallpaper

Id like to make some wallpapers, with me and my friends… when i search my sign my skins some up but when search hers there is nothing. Can anyone help?

@Cado08, did she post her own skin? If not, that will happen, tell your friend to post her skin in nova skin then get the name of the skin to get the skin for the wallpaper.