If you recognise Billie JD Porter, you might be a regular reader of French style bible Jalouse magazine (they're obsessed with her Brit girl style), you may have watched (and giggled at) The Joy of Teen Sex on Channel 4 (she presented it back in 2011) or perhaps you're a subscriber to Vice magazine's video channel (yup, you guessed it, she appears there too). Well as of 9pm tomorrow night, and the next two Wednesdays, Billie will be beaming into your living room via BBC Three's Secrets of South America documentary series, finding out what it's like to be a teen in Venezuela, Brazil and Argentina. We caught up with the 21-year-old multi-tasker about TV icons, personal style and more.