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Just in time for year-end lists to come due, this edition of the Coulda-Shoulda-Woulda Files looks at a song that will top at least one of your Idolators' 2006 singles charts.

Artist: JC Chasez
Song: "Until Yesterday," 2006

What happened: Co-written by Chasez's ex-boybandmate Justin Timberlake, "Until Yesterday" made crowds at Timberlake's club shows earlier this fall go absolutely crazy. We first heard--and went bananas for--the song a few weeks later; in October, it was released as a digital single, and it went to radio last month. Alas, it hasn't done much, aside from inspiring fervent reviews from Chasez's iTunes-enabled fans.

Why it should have been a hit: All those raves that we had for "Until Yesterday" in September? We're sticking by them. This song is just an over-the-top masterpiece, and it gets us singing along--clunky lyrics and all--every time we replay it. We're looking at the Billboard Hot 100 right now, and we can count at least five songs in the top 10 that can't hold this track's jock. Can't Justin help his pal out somehow? You know, for the holidays and all?