I have long been a fan of oversized t-shirts. I love to wear them with leggings and a cardigan in the Winter for an easy ensemble. In the Summer, you can wear them with shorts and sandals, or if you're feeling particularly brave, as a dress.
I also wear an oversized top as a beach coverup on holiday. I love this tiger tee (£24) from ASOS which has a fun '80s feel. If you've got a bigger budget, then Stella McCartney's horse print tee is sure to get you some fashion points. Do you like oversized t-shirts?