If only she went for a darker hair color.
Once a group has a few members, it’ll start to have charts generated: Overall charts, and charts which are unique to it.
The way that overall charts work is that every “1” will represent a group member. For example, say there are 3 people in a group who listened to a certain artist in the last week, it’ll say “3” in the charts and this will mean that 3 members listened to that artist, and not the number of times that the artist was played by all group members.
The “unique to this group” charts which you can choose to view on a group’s page emphasise what is unique about the music taste of that group's members, compared to the listening habits of all other Last.fm users.
This means that these charts don’t just show you what a group’s members listen to like the overall group charts do, but what is special about their listening habits in comparison to what other users on Last.fm listen to (considering the average listener’s behavior):
For example if the members of a group listen to artist A much more often than others do, artist A will be more unique to their group as this will be special to their listening habits, compared to everyone else’s; if they listen to Artist B, but everyone else also listens to artist B a lot, then this will be less special and artist B will be less unique to their group
