No one really knows, so one director, and possibly one actress, are endeavoring to find out. Also today: NBC orders two dubious sounding pilots, Matthew Weiner has a casting change for his first movie, and trouble in New Zealand.

Tony Romo dumped Jessica Simpson, Quentin Tarantino talks retirement, Larry King's wife eyes a Broadway role, Renee Zellweger can't get laid, Megan Fox has to get drunk to watch her movies and Lindsay Lohan's hair is falling out.

In light of Pierce Brosnan's brave, warbling turn in Mamma Mia—as well as recent news that Kate Hudson would veer off the Bongo Romcom highway to explore the musical theater side roads in Rob Marshall's Nine—Defamer videologist Molly McAleer has compiled a countdown of 10 Classic Musical Crossover Performances. We've…