Jon O'Brien

In 1996, Los del Río’s “Macarena” became the second longest-running number one in Billboard history and sparked a dance craze that spread everywhere from the Olympics to the Democratic National Convention.

Although MTV has more recently become synonymous with reality TV and cheap clip shows, there was a time when the network truly did live up to its name. And it all began at 12:01 a.m. on August 1, 1981.

'The Devil Wears Prada' proved that Anne Hathaway’s range extended beyond fairy tale princesses, established Meryl Streep as one of cinema's all-time greatest villains, and taught us all the difference between blue and cerulean.

In 2011, 'Bridesmaids' silenced chauvinists who believed that men had the monopoly on laughs and spearheaded a wave of female-fronted comedies. It also turned Melissa McCarthy into a bankable leading lady.

From 'It's a Wonderful Life' to 'Battlefield Earth,' these box office turkeys proved that it can take just one major flop to send a studio down the dreaded path of bankruptcy.

There were many vital questions posed in 'Dude, Where's My Car?,' the 2000 stoner comedy that established Ashton Kutcher and Seann William Scott as two of their generation’s most lovable doofuses.

There’s a time and a place for a jaunty Hall & Oates pastiche, but—as the creators of 'Cop Rock' discovered the hard way—it’s probably not in the middle of a self-described “baby merchant” getting caught in a child abduction sting.

It's been 20 years since 'Who Let the Dogs Out' was released, and its impossibly infectious hook is no doubt still lodged inside your brain. But two decades later, we're still no closer to answering the question.