The local hip-hop collective and record label Doomtree have been combining beats and MCs for the last five years. In addition to the collaborative EPs, several members including P.O.S., Dessa, Sims, and Cecil Otter have released solo albums.

The XX have accomplished something few other groups have: critical raves, a sellout worldwide tour, and unexpectedly stellar album sales. The best part? They're all 20 years old.