Lily Cole's social network ambition
The model and actress Lily Cole has been running her own social network, Impossible, for a year.
The site allows people to ask for something they need, or offer what they can give for free - without expecting anything in return.
But is it impossibly idealistic? BBC Trending catches up with Cole.
Reporter: Anne-Marie Tomchak
Video Journalist: Alvaro Alvarez
Want more? Watch our profiles of the stars of social media on BBC Trending's YouTube channel.