Philadelphia's clever alt-hip-hop duo Chiddy Bang burst on the scene in early 2010 with their MGMT-sampling track "The Opposite of Adults." They formed in 2009 as a four-piece electronic-meets-hip-hop group, but by the end of the year their lineup had been reduced to the duo of rapper Chidera "Proto" Anamege and Xaphoon Jones (aka Noah) on production. After building their rep on the Internet by posting tracks like the Tom Waits-sampling "Ice Cream Man," the band released its Swelly Express mixtape in October of 2009. Proto's witty rhymes plus the sampling of indie heroes like ...