fan:
plural: ‘fans‘ — for the right pronunciation,

‘Harry Potter’ fans ready to receive their idol
a person who likes some hobby or someone very, very much, and spends time and money in order to be with that thing or person;
a strong supporter or follower of something or someone, such as a sport, art, or a famous person (‘fan’ in this usage has a positive connotation, i.e. used in a positive sense),

football fans at a match
I am a fan of the great man Gerrald Durrell who founded a special zoo on Jersey Island in the English Channel.
Jeremy had eight very close friends and he shares every thing with them, but only one thing separates him from them — he is a football fan but his friends are cricket fans!
Sports fans are known to be very violent at times, and experts wonder if there is any ‘behind the scenes involvement’ of the organisers of those particular sports events in instigating the fans to resort to violence.
There are also several instances where very stupid male fans of film actresses who try to harm their favourite actresses because they are jealous of those actresses being liked by other people, too, or in some more bizarre cases, for not acting well!
