Justin Timberlake Talks William Rast and Jessica Biel on Oprah

"We've always wanted to get into it," Justin says. "I think there was more actual apprehension for me because, in this day [and] age, you do something, you want it to come across genuine."

The name of the fashion line, which is known for its premium denim, is a tribute to two important men in their lives—their grandfathers. "Trace and I are huge fans of our grandfathers," Justin says. "William is my grandfather's first name, and Rast is his grandfather's last name. So we took the names, and put them together."

Today, Justin is wearing William Rast "Ben" jeans with a New America T-shirt, utilitarian shirt and a dark gray wool blazer.

The pop star, who also owns the William Rast clothing line and the Tennmen Records label, will complete his trifecta of J.T.-branded items when he launches his very own brand of tequila.

According to a statement, the tequila was named 901 as a tribute to "that time of night when your evening is ending, but your night is just beginning." It's also a nod to Timberlake's hometown, since it's the area code for Memphis, Tenn.

The tequila, which was in development for more than two years, will be available to rock your body and make you do the worm in early May exclusively in New York, Los Angeles, Las Vegas and St. Louis, Mo.

“I’m not engaged,” he told Oprah. “If she’s engaged, we have a problem.”

The quick-witted singer also joked that his “Saturday Night Live” appearance as a backup dancer for Beyonce in November 2008 was the most romantic thing he’d done for his girlfriend lately.

“I’d say pantyhose and a leotard is up there,” he said.

Justin, who told “Oprah” he has an open invitation to “SNL,” followed up his “Single Ladies” dance recently, appearing on the sketch comedy show with Jessica. The two took on the role of cartoon characters on “Weekend Update.”

As for Jessica’s own outfits, he said she’s a big fan of his clothing line.