You know it's spring when the white high-water pants come out. Michelle Obama wore a pair last night for an evening of music and poetry in the White House, paired with silver kitten heels and a pretty, patterned off-the-shoulder top from British label Basso & Brooke's spring 2009 collection. Is she ready for Martha's Vineyard, or is she ready for Martha's Vineyard? See the full look in the Michelle Obama Look Book.