I can say, without a doubt, that the object of my fem-crush is Jenny Lewis, of Rilo Kiley/Postal Service/Jenny Lewis & The Watson Twins/Jenny & Johnny/Troop Beverly Hills fame. Not only is she a talented songwriter and musician, but when you see her perform live you wish you could also possess such an adorably sexy personality. And darn it all...she can do the Freddie. Rilo Kiley is my all-time most favorite band. Their songs get me through the craziness that is my life, and it's not uncommon to hear me quote their lyrics while giving friends life advice.
Give her new stuff a listen. This is Jenny & Johnny (Johnny = Johnathon Rice, her boyfriend and a talented musician):