H-how about you do;
Torinoko City
Rubik's Cube
Luka Luka Night Fever
Division Destruction of Hatsune Miku (Need a chorus)
Harvest (Need a partner)
Colorful x Melody (Need a partner)
Declare War on all Vocaloid
Rolling Girl
Ai Kotoba
Happy Synthesizer (Need a partner)
Secret Time After School (Need a chorus)
Interstellar Flight
Hope
Wavefile
Dear You
Why Don't You Call Me Yet?
World's End Dancehall (Need a partner)
These are just a few suggestions that might be able to keep you busy. If you want, you can use my UTAU in some of these... (Trying to sneak my UTAU into a song because no one has used her yet lol)
Just tell me if you're interested, and sorry for springing so many songs on you. XD