Will Smith has marked his first day on Instagram. From snapshots with Ellen DeGeneres to shout outs from Justin Timberlake, the actor's page is a success in more ways than one.
Khloe Kardashian is one of the most photographed celebrities in the world; she also has a habit of being accused of Photoshopping her images. How much is reality, and how much is just technology?
Taylor Swift, The Rock, Norman Reedus, and Anna Kendrick all make appearances on this list of the best celebrity Instagrams of 2015. See who else is a master of social media.
