Watch: The Wall meets YouTube star Zoella

ZoellaBeauty, fashion and lifestyle vlogger Zoella has more than 5.5 million fans subscribed to her YouTube channel and is among the new generation of celebrities making a name for themselves among throngs of teenage consumers.

We met her at YouTube festival, Summer in the City, which brought together 100 YouTube stars and thousands of fans, where she told us how she comes up with her new content and what she really thinks about brand partnerships.