On Record Store Day, April 21, the Flaming Lips will release their new collaborative double-LP, which features assists from Bon Iver, Erykah Badu, and a whole ton of other people. On the same day, they'll also release a 7" single of their Soft Bulletin classic "A Spoonful Weighs A Ton." And on that single's flipside, Atlanta metal monsters Mastodon will ...