By Steven Mirkin
Updated March 13, 1998 at 05:00 AM EST

Practically worthless now, the The Wedding Singer (Maverick/Warner Bros.) soundtrack will be a boon to future pop historians. They’ll gain insight into alt-rock’s decline (The Presidents of the United States of America’s slapdash cover of ”Video Killed the Radio Star”) and marvel at how an era could produce both the trivial bombast of Thompson Twins’ ”Hold Me Now” and New Order’s epochal ”Blue Monday.” C-