My hair, is is too short for extensions...?

my hair is roughly this length: a href="http://www.iheartpink.popstory.com/pics/albums/2006/12%20Dave%20Hogan%20%5BNobody%20Knows%20set%5D/normal_017.jpg" rel="nofollow"http://www.iheartpink.popstory.com/pics/…/a i can just about get curls into it, it looks like this: a href="http://i31.photobucket.com/albums/c384/aziajs/81786_pink7_122_323lo.jpg" rel="nofollow"http://i31.photobucket.com/albums/c384/a…/a would i be able to use these hair extensions: a href="http://beauty.hsn.com/hairdo-from-jessica-simpson-ken-paves-22-l-relaxed-curl-extension_p-4193830_xp.aspx?sf=bs&attr=3099&prev=hp!3099&cm_re=product_carousel*page1_spot3_image*NewDoNewYou-ken_paves&ccm=bs|3099" rel="nofollow"http://beauty.hsn.com/hairdo-from-jessic…/a and get a natural look without a visible weft line? TIA