She's finally ready to share her secret obsession…. Gayle King, Oprah's best friend, is totally hung up on finding the best burger in America! After reading an article in GQ magazine called "20 Hamburgers You Must Eat Before You Die," Gayle made it her mission to sink her teeth into every all-beef patty on the list.

The culinary quest began with a three-hour train ride from Gayle's home in Connecticut to Philadelphia, where she headed straight to Rouge, home of the #4 burger on the list. "Let's just say it was worth the day trip," she says with a grin.

Before Oprah's cameras joined Gayle on her journey, she hit three other hamburger hot spots. In Chicago, Gayle headed to Poag Mahone's for the 18th best burger in America. Then, it was off to The Counter in Santa Monica, California, where she chowed down on #15. Moving up the list, Gayle noshed on #9 at New York City's Burger Joint, located inside Le Parker Meridien Hotel.

After flying coast-to-coast, Gayle was ready for more familiar territory.  Back in Connecticut, Gayle didn't have to go far from home to satisfy her hankering for a hamburger. Louis' Lunch, located in New Haven, serves up #20 on the list.

Louis' Lunch, which was established in 1898, prepares their specially blended beef fresh every day. Once the patties are perfect, they're cooked sideways in a stove that's more than 100 years old. Jeff, the owner, says this is the same stove his great-grandfather used to cook the very first "hamburger sandwich."

In keeping with tradition, you won't find any buns in this burger joint. Jeff's great-grandfather put the first Louis' Lunch burger between two slices of bread and that's how they serve them today. Don't ask for mustard or ketchup either—these hamburgers are served with cheese, tomatoes and onions only!

Gayle's obsession doesn't stop here. She returns to the Big Apple for a bigger burger.  Although Peter Luger Steak House in Brooklyn, New York, is best known for their choice cuts of beef, they rank high on GQ magazine's list because of their choice cheeseburger.

Gayle says Peter Luger's steaks are "quite good," but during this visit, she's hungry for the #2 burger in America! Creators of the "Luger burger" say the secret to their success is packed into the patty. Chefs only use top-quality meat like prime-aged porterhouse trimmings and prime chuck in their burgers.

When Gayle's cheeseburger arrives at the table, she takes a moment to applaud the picture-perfect presentation before digging in. "They were telling me that the place is so good, they don't have to advertise," Gayle says. "Strictly word of mouth. So from my mouth to yours…delicious!"

Finally, Gayle makes it to the top of the list! After carrying the GQ article around in her purse for months, Gayle finally made it to the top of the list! She traveled all the way to Hollywood, Florida, for a taste of the #1 burger in the nation.

From the outside, you may never guess that Le Tub is home to such a prestigious patty. Gayle says this burger joint has a lot of character…one of the first things she noticed was a decorative toilet seat outside the door filled with mulch! Thankfully, Gayle didn't travel hundreds of miles for the ambiance. She's here for the famed Sirloin Burger!

Steve, Le Tub's owner and burger cook, knows exactly what makes his hamburgers so special. "We use fresh-ground sirloin," he says. "We never freeze anything—it's all fresh!"

Secret seasonings also help make these slow-cooked burgers a big hit. "That is very, very, very good," Gayle says after biting into the #1 burger. "Bravo, Le Tub. Bravo!"