List of Songs Marjolein (Airi?) Knows

Hatsune Miku:
- Rolling Girl
- Two Breaths Walking
- World Is Mine
- Hello/ How Are You
- Senbonzakura
- Hyperventilation Dance
- Karakuri Pierrot
- Levann Polka
- Popipo
- Shinkai Shoujo (Deep sea girl)
- Shinitagari (You wanna die?)
- Irony
- Two-Faced Lovers (I’m not (yet) able to sing it though)
- From Y to Y
- 1925
- Melt
- A Song I’d Like To Sing
- Triple Baka
- Lynne
- Alice
- Eh? Ah, Sou
- Hello, Planet

Megpoid Gumi:
- Coward Montblanc
- Mozaic Roll
- Ama no Jaku
- Miracle∞Gumiracle (Originally not vocaloid)
- Eye Examination
- Renai Circulation (wait, that’s not a vocaloid song? Is that not Gumi either?)

Megurine Luka:
- Double Lariat
- Just Be Friends
- Interviewer
- Leia
- Toeto

Kagamine Rin:
- Meltdown

Kaai Yuki:
- World’s Only Person (or something like that, it might actually not be her song)

Other:
- Matryoshka (Gumi and Miku)
- Happy Synthesizer (Gumi and Luka)
- Twinkle, Twinkle (Miku and Luka)
- Bad Apple (I actually don’t know what that is but I know the song)
- Magnet (Miku and Luka)
- Bad End Night
- Kagome Kagome (Circle you Circle you) (Luka and Miku)
- Romeo and Cinderella (Rin and Len)
- I think Mr Music is easy to learn
- Fukkireta (not sure who sings it)
- World’s End Dancehall (Luka and Miku)
- Yuuhi Saka (not sure who sings this)
- Nyancat?

Should I also post non-vocaloid songs? Because then this will be a long list. Well, I like making lists so here we go.

Non-vocaloid:
- Megumeru (Clannad)
- Dango Daikazoku (Clannad)
- Toki Wo Kizamu Uta (Clannad)
- Torch (Clannad)
- Chiisana Tenohira (Clannad)
- More soundtracks from Clannad
- Tenshi no Clover (Astarotte no Omocha!)
- Manatsu no Photograph (Astarotte no Omocha!)
- My Soul, Your Beats! (Angel Beats!)
- Brave Song (Angel Beats!)
- My Song (Angel Beats! GirlDeMo)
- Ichiban no Takaramono (Angel Beats!)
- Crow Song (Angel Beats! GirlDeMo)
- Oath Sign (Fate/Zero)
- Memoria (Fate/Zero)
- To The Beginning (Fate/Zero)
- Sora ha Takaku Kaze ha Utau (Fate/Zero)
- Perfect Day (Supercell)
- Bird (Kuroshitsuji)
- Lacrimosa (Kuroshitsuji, Kalafina)
- Kanata He (Kuroshitsuji)
- Connect (Madoka Magica)
- Magia (Madoka Magica, Kalafina)
- Katayoku no Tori (Umineko no Naku Koro ni)
- Higurashi no Naku Koro ni (Higurashi no Naku Koro ni)
- Dear You (Higurashi no Naku Koro ni?)
- Naraku no Hana (Higurashi no Naku Koro ni)
- Kaze ni Naru (Neko no Ongaeshi, the cat returns)
- Always With Me (Spirited Away)
- Katayoku no Ikarosu (H2O Footprints in the Sand)
- Kazahane (H2O Footprints in the Sand)
- Tori no Uta (Air)
- You (Shuffle!)
- Innocence (Shuffle!)
- Last Regrets (Kanon 2006)
- Little Busters! (Little Busters!)
- Boys Be Smile (Little Busters!)
- AliceMagic (Little Busters!)
- Guren no Yumiya (Shingeki no Kyojin)
- Irony (Oreimo)
- Morning Arch (A-Channel)
- Hyadain no Kakakata-Kataomoi (Nichijou)
- Hyadain no Jo- Jo- Yuujo
- Lilium (Elfen Lied) (not Japanese)
- Snow Fairy (Fairy Tail)
- Yura Yura (Naruto)
- Kanashimi o Yasashisa ni (Naruto)
- Undo (Full Metal Alchemist)
- Balance Kiss (kissxsis)
- We Are! (One Piece)
- Fallen Angel (Panty and Stocking) (not Japanese)
- Chocolat (Panty and Stocking) (oh, also not Japanese)
- Crossing Field (Sword Art Online)
- My Sweetheart (Tokyo Mew Mew)
- Moon Pride (Sailor Moon Crystal)
- Secret Base (Anohana)
- Aoi-Shiori (Anohana)
- Who Killed U.N. Owen? (Touhou?)

I think that's it?