An instant way to uplift your wardrobe or drab old t-shirts and jumpers is by getting statement necklaces that double up as collars. It has happened numerous times where I have worn such necklaces on top of plain tops/dresses/jumpers and people have mistaken them for a new outfit. HAH!
Places where I have found such treasures is ASOS, H&M, House of Fraser, TopShop and just scouring the web. A while ago I did a feature on statement necklaces and the link is as follows: