Animal Collective's balmy, colorful headlining set was a Pitchfork Festival highlight. On Goldfrapp's "Caravan Girl" digital single, they sprinkle a thimble full of tropical fireworks onto Seventh Tree's "Little Bird." It's an interesting, pretty overlap -- Alison Goldfrapp's smeary, plaintive vocals and AC's percussive magic spiraling into an extended (and understated) coda swirl. It's the best use of Goldfrapp this ...