Who directed 'Mean Girls' (2004)?

Who directed 'Superbad' (2007)? Who directed 'The 40-Year-Old Virgin' (2005)? Who directed 'Knocked Up' (2007)? Who directed 'Bridesmaids' (2011)? In what year was 'Mean Girls' released? Who directed 'Clueless' (1995)? In what year was 'Clueless' released? Who directed 'Fast Times at Ridgemont High' (1982)?