Tagged them all. The only two I couldn't get are the manly-looking Len at the right and the younger Kagamines at the top. Also, removed the Paradicholorobenzene tag since I don't see that anywhere.
Roger that, I'll avoid editing multiples from now on then.
The two younger ones in the top are from Paradichlorobenzene. The design on their headphones and Rin's dress is similar to the one in the PVs.
Also the red checkerboard and crosses they're standing on.
Gekokujyo (Revolution)Aku no Musume (Daughter of Evil)Aku no Meshitsukai (Servant of Evil)OriginalNobori Bou (Ascending Pole/Uphill Pole)Tsumugi Uta (Spinning Song)Tiger RampageIke Renka (Cool Love Song)Spice!Adolescence Gemini (Project Diva 2nd)Trick and TreatHai to Atoriesuta Nite (In The Ateliesta Ruins)Noroi no Megane (The Cursed Glasses) - Stray Girl in Her LensesShuumatsu ga Yattekuru! (The Weekend is Coming!)MelancholicGokurakuchou (Bird of Paradise)Tengaku (Music of the Heavens)FireFlowerParadichlorobenzeneIroha UtaJuvenileKokoroKokoro: KisekiAppendRoshin Yuukai (Meltdown)SiGReRoshin Yuukai- Hard R.K. MixKagamine Len no Bousou (The Rampage of Kagamine Len)Magical Neko LenLenMigikata no Chou (Butterfly on the Right Shoulder)