Jimmy Fallon's barbershop quartet bit had a surprise guest this time out, with Kevin Spacey joining in for Jason DeRulo's "Talk Dirty." The Ragtime Gals are always fun, but hearing Kevin Spacey sing "your booty don't need explainin'" is worth two minutes of your time.

By the by, I also just saw his Spacey's new documentary, "Now: In the Wings on a World Stage." If you're a theater person, or into House of Cards, it's worth it. Turns out Frank Underwood is loosely based on Shakespeare's Richard III.  And more importantly, Agent Meacham is in it!