What do education campaigner Malala Yousafzai and music sensation Lorde have in common? Well, according to Ricky on this morning's Newsround, the answer is that they've just be named on a list of the world's most influential teenagers. President Obama's two daughters, Malia and Sasha, are also on the list.

In May 2012 the President cited his daughters' views as a factor in the decision to abandon his opposition to same-sex marriage. That story was widely reported, but not by CBBC Newsround.