40 Most Powerful Images Of 2014

5. The Most Retweeted Tweet Of All Time

An Oscar's selfie taken by Ellen DeGeneres that included Meryl Streep, Angelina Jolie, Brad Pitt, Jennifer Lawrence, Bradley Cooper, Julia Roberts, Lupita Nyong'o, Kevin Spacey and many other stars became the most retweeted tweet ever - with 750,000 retweets in just half an hour.

The photo knocked Barack Obama's tweet, when he won his second term in office, off the top spot.