JT continues to be a trendsetter, through both his personal style — picture funky tailored looks with comfy sneakers — and various other ventures, such as his William Rast fashion line and appearances in ads for Givenchy and Sony. But let’s not forget that he’s also an entertainer: Timberlake was most recently nominated for three Grammy awards, including Best Rap Song, and his “Saturday Night Live” appearances have become the stuff of legend.

The first lady isn’t the only one in the White House with a sense of style. Known for wearing sleek, well-tailored suits emphasizing dark colors and crisp white shirts, President Obama is teaching men how to wear suits again. The president has had an impact on the high-end men’s footwear space as well. He helped influence a Johnston & Murphy panel-toe oxford with sleek toe character, furthering the White House’s longstanding relationship with J&M.

Since making a major jump to the big screen in 2000, Clooney has become the consummate leading man. The Oscar-winning actor’s fashion sense, highlighting classically clean suits with a modern edge, has evolved right along with his growing popularity. And he always accessorizes well with a beautiful partner by his side.

What hasn’t Jay-Z influenced is really the question. The always stylish rapper, fashion mogul, record exec and Grammy award winner has been unstoppable for the last several years. Most notably, Beyoncé’s husband is still chief creative officer of Rocawear, the 10-year old, $700 million fashion brand that he co-founded and later sold to Iconix Brand Group Inc. in 2007.

Despite his ever-changing appearance (think of the grizzly goatee of late or his oft-donned fedoras), Pitt, a longstanding model for Japan’s Edwin Jeans, has become a style icon. Recently, Pitt, and his equally fashionable baby mama, Angelina Jolie, announced plans to design jewelry for high-end label Asprey.

The soccer player has long been known for his desire to look edgy and sexy, whether in a well-tailored pinstripe suit or more casual attire. Beckham, one of the world’s highest-paid athletes, has also dipped into the fashion scene via a recent collaboration with Adidas, in which he designed an Originals by Originals apparel and accessories line in partnership with the owner of L.A.’s Undefeated stores, James Bond

The huge success of the “Twilight” film series (and subsequent mystery over his suspected romance with co-star Kristen Stewart — are they or aren’t they dating?) has thrust the often-scruffy Pattinson into the limelight. The self-proclaimed non-trendy dresser is frequently seen wearing basic black Nikes, but perhaps it’s Pattinson’s I-don’t-care attitude that has female (and probably male) teens looking up to the actor for fashion tips.

The often-scandalous musician/record producer stayed on the edge this year with a couple of unnecessary outbursts, but it’s his retro hip-hop style that has fashionistas keeping an eye on the entertainer. West partnered with Nike to create the Air Yeezy sneaker, which was released in spring and features a “modern classic” look.

Though he is perhaps the slightly lesser-known star of the “Twilight” series, Lautner made up for it this year. As the youngest celebrity on this list, the 17-year-old — who is also a martial arts master — has hit Hollywood running, dating country singer Taylor Swift and most recently hosting “Saturday Night Live.” His next project, “Max Steel,” is still in development.

Sean “Diddy” Combs is almost as accomplished in fashion as he is in music. With his Sean John and Sean by Sean Combs clothing lines, his vodka brand Ciroc and two fragrances, it seems like the man should be busy enough, but Combs also added another item to his clothing line stable in late 2008 by acquiring the Enyce label from Liz Claiborne Inc.