I saw this same sweater on Mena Suvari in a magazine. She was wearing it with a crisp white empire waist top (kinda bohemian-ish) and tighter fitting dark wash jeans. I cut the picture out because I thought it was really cute.
Ooooooh...I have that sweater and I wear it with everything! I'm going to steal the Mena Suvari outfit too. I wear it over a tank with jeans when I want to be casual or over a blouse and pants/skirts for work. I wear it with this top a lot:
And it goes with so many colors, like brown, pink, light blue, yellow, red, light green.