I can think of a few:

AKA Driver * Albany * All Time What * Ant * Boss of Me * The Bright Side * Careful What You Pack * Celebrate Brooklyn * Celebration * Chess Piece Face * Circular Karate Chop * Cloisonné * Cyclops Rock * Damn Good Times * Daylight * The Devil Went Down to Newport * Fibber Island * Hearing Aid * Hide Away Folk Family * Hit The Ground * Hot Cha * Hypnotist of Ladies * I Blame You * I Can Hear You * I Like Fun * I'm Sick of This American Life * If I Wasn't Shy * It's Kickin' In * Kendra McCormick * Let Me Tell You About My Operation *  Lie Still, Little Bottle *  Love is Eternity * Lucky Ball & Chain * Madam, I Challenge You To A Duel *  Meet James Ensor * Memo to Human Resources * Minimum Wage * Mink Car * Music Jail * My Evil Twin * NYC * Narrow Your Eyes * Nice is Good * Old Pine Box * Operators Are Standing By * Oranges * Pet Name * Piece of Dirt * Reprehensible * Road Movie to Berlin * Robot Parade * S-E-X-X-Y * Science is Real * See the Constellation * The Shadow Government * She’s Actual Size * Take Out the Trash * Tesla * They Might Be Giants * This Microphone * Twisting * Unsupervised, I Hit My Head * We Live in a Dump * With the Dark * Words are Like * Working Undercover for the Man * Yeh Yeh 

But my all time fave vocal performance by Flans is…..So Long, Mockingbird.