Dan Laughey describes para-social interaction as "the apparent familiarity between media personalities and audiences". Seeing a favourite celebrity support a cause can influence fans to support the same cause—not because the cause is significant to the fans, but because it seems significant to the artist. To feel connected to a celebrity, fans are likely to participate in activities the celebrity considers important. For example, if a benefit concert starred unknown musicians performing songs for unknown people in Africa, the incentive for viewers to donate would be minimal. Bob Geldof, the founder of Live Aid, is aware of the need of familiarity and para-social interaction on behalf of the viewer. When criticised for not inviting enough African performers to play at Live Aid (of which the main purpose was famine relief for Africa), Geldof commented that only popular musicians were invited to play at the show because unfamiliar artists would cause viewers to lose interest and "switch off". In seeing the familiar face of their beloved artist on stage endorsing a cause, fans feel more compelled to support the cause.