What song should never be played at a wedding?

Midnight confessions, Grassroots

Let's Call The Whole Thing Off:  Fred Astaire; Willie Nelson, many others.

Tubular Bells - Mike Oldfield

I hate myself for loving you, Joan Jett

"Thorn In My Side" - Eurythmics

She Hates Me - Puddle of Mud

The band dropped the explitive from the title, but not the lyrics.

She’s gone, Hall&Oates

"I Hate Everything About You" - Three Days Grace

(You're Having) My Baby:  Paul Anka   (this would have been a good post a few decades ago...shotgun weddings and all that)

I’m not in love, 10cc