how to reply to a celebrity's text? he wished me happy new year?

[♡ Sanju ♡]

i have a famous singer in my facebook.. he is very popular guy and very nice guy too.. he doesn't have any ego or arrogance.. he chats with all his fans daily without avoiding.. i chatted with him few times before but i was uncomfortable while chatting with him because i was excited... but he is very friendly.
so i wished him yesterday "happy new year (his name) "
he replied "happy new year (my name) "
i dont know what else to reply and how to carry on the conversation... i dont want to look so desperate or crazy by saying things like "oh my god thank u so much you are very nice awesome i'm your fan i like ur songs blah blah.." because i say those things everytime i chat with him..
hmmm so.. how to reply him now?
hey no.. he is not fake person.. i'm 100% sure about it.. he has his school friends, family and co-singers and other celebrities related to musci field and movie industry..