I am looking for a slang term which describes people who are all about contemporary mass media promoted pop culture: pop song charts, YouTube likes, dislikes and comments, celebrities' instagrams, etc. A slang word for a person who is extremely dependent on "currently in the top" people's lives.
The person who follows celebrities on social media day by day and comments on every photo and YouTube video with something like "justin rocks☺☺😊😆😊😆😊", "Who''ll watch This In JANUARY 2016?", "Who's Watching This In FEBRUARY 2016?". The context should be somewhat cynical. Something like "pop-headed", "likes-headed", "YouTube-thumbs-upper", etc.
Do you have any suggestions?
Update 1: The words "twit" and particularly "ditz" are close to what I am looking for.