Breaking a mirror. Crossing paths with a black cat. Tossing salt over your shoulder. Which superstitions are believed by the most people?

NSYNC. Backstreet Boys. The Beatles? What exactly defines a "boy band," and which boy band is the best-selling of all time?

Darth Vader. Michael Myers. Francis from Pee-wee's Big Adventure. Which iconic movie villain is the most villainous of all time?

Join Anna Keller in guessing the Top 10 Most Visited Cities, ranked by the average number of annual international tourists.

Covering the Top 10 Biggest One-Hit Wonders in Music History, ranked by a combo of pop culture influence, sales and chart history, and more.

Depression. Schizophrenia. OCD. Which mental illnesses are the most commonly diagnosed worldwide?

The Last Supper. Starry Night. Which paintings have stood the test of time to be known as one of the world's all-time most famous paintings?

Nick and Anna discuss the personality assessments throughout history that are most commonly used in the field of psychology.

Freud. Skinner. Pavlov. Which famous psychologists are responsible for the most influential (and weird) experiments in modern history?