20-year-old Jennifer Lawrence has been acting since she was 14, but only been in serious, depressing roles like "Winter's Bone," "The Burning Plain," and "The Bill Engvall Show". Thankfully, this Summer she finally got to show off her cool, sexy side as the naked-by-default Mystique in X-Men: Origins. Hopefully, that will bring about a new wave of sexiness, but until it does, check out the 20 hottest photos taken of her so far.