Initially, eight houseguests entered the house. Shortly after, five additional guests were introduced—all of whom were ex-boyfriends or ex-girlfriends of the original cast.
A sorority sister from Pennsylvania, Alison came to play. She lied, cheated, backstabbed, and openly admitted to using sex appeal as a weapon. Her most famous moment? The "Floating" strategy. Unlike Dr. Will's "I hate you all" approach, Alison perfected the art of making everyone believe they were her #1. She betrayed her showmance (Nathan), her ex (Donny), and her closest ally (Jun) without blinking. Big Brother USA Season 4
In a stunning turn, Robert won the final HoH Part 1. He evicted his own ex, Erika (4th place). Then, in the final endurance competition (holding a key in a device while covered in goo), Alison outlasted Robert. In the final Part 3 (jury questions), Alison won and made the most consequential decision of the season: She evicted , taking Jun to the Final 2. Initially, eight houseguests entered the house