Following in the footsteps of other legendary boy bands that teens (and, perhaps more importantly, pre-teens) have known and loved, CD9 are a social-media-savvy group bent on reigniting passion for the style. Formed in 2013, CD9 evolved from Mexican indie-pop kids into a Spanglish-speaking supergroup. On 2016's Evolution, the hard-working quintet sings catchy pop, digs into euphoric EDM, and launches smoldering reggaetón jams. Smart, peppy collaborations with sister groups like Korea's Crayon Pop clarify their international aspirations.