The sixteenth season of Big Brother marks the show's first HD season and the house will feature a whimsical urban tree house-themed dwelling with bedroom decor that includes classical elements earth, wind, fire and water. This year's twists include two Houseguests winning the coveted role of "Head of Household" each week along with the fans having a unique opportunity to significantly influence the game with a new interactive element called "Team America." To add to the drama Big Brother will introduce an entirely new high-stakes competition, "Battle of the Block," which will dramatically shift the power in the house each week. Julie Chen hosts as the Houseguests play for the chance to win $500,000.