About my hair?

how can i grow my hair this long cant i take a pill or something,that pregnat women take to make there babies get healthy i need help i whant my hair like this a href="http://images.search.yahoo.com/search/images/view?back=http%3A%2F%2Fimages.search.yahoo.com%2Fsearch%2Fimages%3Fp%3Dmiley%2Bcyrus%2B%26ei%3DUTF-8%26fr%3Dslv8-fpms%26b%3D61&w=388&h=594&imgurl=delivery.viewimages.com%2Fxv%2F74724722.jpg%3Fv%3D1%26amp%3Bc%3DViewImages%26amp%3Bk%3D2%26amp%3Bd%3D17A4AD9FDB9CF1933D389E1A66A489864541DA10CB49C085C55B961467DC3898&rurl=http%3A%2F%2Fwww.viewimages.com%2FSearch.aspx%3Fmid%3D74724722%26amp%3Bepmid%3D3%26amp%3Bpartner%3DYahoo&size=42.8kB&name=74724722.jpg&p=miley+cyrus&type=jpeg&no=79&tt=987&oid=b01397b2034d24b8&ei=UTF-8&src=p"http://images.search.yahoo.com/search/im…/a