The UN has declared Pakistani education activist and Nobel laureate Malala Yousafzai as "the most famous teenager in the world" in its 'Decade in Review' report.In part one of its review series, which takes into account events that happened between 2010 and the end of 2013, the UN highlighted the devastating Haiti earthquake in 2010, the beginning of the ongoing Syrian conflict for 2011 and Malala's work in favour of girls' education for the year 2012, The News International reported on Thursday.