Mine is "Taeminnieah" hahah
And I follow a lot of idols and NO fake ones, so maybe you can check in my account. I really dont follow that many people besides idols so it shouldnt be a problem ahha

I don't have one, but here's a few of the idols instagrams I know:
Shinee Key- bumkeyk
Exo Kris- galaxy_fanfan
Super Junior Donghae- leedonghae
2ne1 Dara- daraxxi
Jaejoong- bornfreeonekiss2

Key - bumkeyk
Amber - ajol_llama
Boa - boakwon
Heechul - kimheenim
Shindong - earlyboysd
Donghae - leedonghae
Hyoyeon - watasiwahyo
Sooyoung - syofgg
Sunny - svnnynight
Taeyeon - taeyeon_ss
Yuri - yulyulk
Kris - galaxy_fanfan
Seungri - seungriseyo
Taeyang - youngbeezzy
G-Dragon - xxxibgdrgn
CL - chaelin_cl
Woohyun - nwh91
Eric Nam - realericnam
Zelo - byzelo
Himchan - strong_chan
Jongup - m_jup
Eli - u_kisseli

I am not 100% sure about some accounts (Eli's Instagram for example) ^^;;
But this are the only kpop celebrities that I follow :]

http://kpoplists.com/post/45179496961