Brain remembers familiar faces when choosing potential mate - University of Liverpool

The research team found that people find familiar faces more attractive than unfamiliar ones. They also found that the human brain holds separate images of both male and female faces and reacts to them differently depending on how familiar it is with their facial features.

More info in this press release: Brain remembers familiar faces when choosing potential mate - University of Liverpool

Alas, only the press release is available, not the full article. The quotes are somewhat clumsy, and makes it hard to determine what's really been done here. It may just be a repeat of the old result "Those that are closer to average seems more attractive."