With its schoolyard chants, deep-bass detonations, and empowered handclaps, the unabashedly excited “Boom Boom Pow” is an electro anthem intended to unite the world. Given the Dirty South upsurges of “Imma Be,” the disco jams of “Out of My Head,” and the New Wave revival of “Rock That Body,” there’s something for everyone on The E.N.D. (The Energy Never Dies). No matter who or where on Earth you are, “I Gotta Feeling” and “One Tribe” speak the all-inclusive language of fun and unity.