Season 27 of “Big Brother” concluded with a two-hour live finale that drew an average of 4.3 million viewers on CBS, marking the show’s biggest audience in over three years. The season had been streamed for 8.4 billion minutes and episodes were averaging 5.1 million viewers after 35 days of availability. The finale saw 25-year-old Chicago attorney Ashley Hollis crowned as the winner of the $750,000 prize. Hosted by Julie Chen Moonves, “Big Brother” follows a group of houseguests who must vote each other out until one person remains.