self-groupie

Or simply 'groupie'...
Much like a 'selfie', this is when two or more people pose for a photo that is simultaneously being taken by one of the photo subjects, normally with the intent to upload to social media after it has been taken.
Also like a 'selfie' this photo is taken with one member of the group extending an arm to capture all of the members (and his/herself) in the photo as well.

By the pure definition of the world 'self', Ellen Degeneres' photo taken with several of her fellow Hollywood stars at the #Oscars2014, could not have been a 'selfie'; instead, it would be referred to as a 'self-groupie' or simply a 'groupie'. This is not to be confused with the 'Groupies' that hang around stars and famous people, hoping to be seen or included in that lifestyle of glitz and fame.