Twenty-somethings learn they must live like it is the 1990s in order to win $90,000.

Houseguests compete in a music video challenge with help from Joey Fatone.

Bill Bellamy teaches the housemates how to up their dating game in a pick-up challenge.

The housemates are put through a movie challenge that brings rivalries to a head.

Kel Mitchell and Lori Beth Denberg from "All That" help the housemates.

Kid 'n Play and Pepa and Spinderella help the housemates in a rap battle.

Joey Lawrence helps the housemates transform into famous '90s icons.

The final three housemates must deliver a show-stopping performance in front of a live audience.