Ten is a special number; it's solid and definitive, plus when you get to the tenth in a series of things you know it is going to be memorable. That's especially true of BIG BROTHER 10, which returns this summer with a new cast of HouseGuests all vying for the $500,000 prize. Host Julie Chen explains that for the first time in seven seasons, all the players are total strangers. This time around, all 13 Houseguests are competing on their own. The baker's dozen is assembled by the front door for what they expect will be the traditional BIG BROTHER house move-in. Well, as all seasoned BIG BROTHER watchers know, expect the unexpected. Julie explains that for the first time ever they are choosing the first Head of Household of the season before anyone moves into the house! "All you have to go on is your fellow HouseGuests' appearance and gut instinct," Julie explains. Without talking, the HouseGuests vote for the HouseGuest they'd like to see as HoH, with the condition that they cannot vote for themselves. The votes are cast, but who is HoH remains a mystery for now.