Happy birthday, Michelle Obama! Tomorrow the First Lady will ring in her 46th year. In honor of the occasion, StyleList staffers have pulled together some gift ideas based on her ever-expanding wardrobe and the spring season's top trends.

Read on to find out our picks and what seasoned professionals including Sonia Rykiel, J.Crew's Jenna Lyons and hair guru Ted Gibson have to say about the fashionista-in-chief.

Mellow in yellow. The First Lady has a penchant for chartreuse ensembles. Photos: Christophe Guibbaud, MCT | Neilson Barnard, Getty Images

SOMETHING CHARTREUSE: There is no denying that Mrs. Obama loves to experiment with color and the First Lady pulls off this tricky hue with panache. In December, she donned a killer laser-cut velvet coat and dress from Calvin Klein's Fall 2009 collection (above, left). While visiting Rome in July, she favored a Liz Claiborne cardigan and matching chartreuse skirt from J.Crew. For spring, we're recommending that she receives a package with Rachel Roy's slim-fitting jersey dress tucked neatly inside (above, right). Not only has Roy been established as one of MObama's go-to designers, but this slinky number will also show off her admirable pilates-toned arms.

Smart toppers. A coat for every occasion. Photos: J. Scott Applewhite/AP | Pablo Martinez Monsiuais/AP| Jemal Countess/Getty Images for IMG

CHIC COAT: The First Lady knows that a dashing coat makes all the difference. From the Narciso Rodriguez inaugural outfit (that she recently wore again in December, above, left) to the brocade tangerine dream by Isaac Mizrahi as seen in November (center), she has proven that outerwear is not an afterthought. For spring, we'd love to see her in this metallic brushstroke cotton broadcloth coat by another one of her fashion favorites, Michael Kors.

Michelle Obama Black Jacket Sonia Rykiel

The bold shoulder. Photos: Sean Gallup, Getty Images | Courtesy of Sonia Rykiel

TRAIL BLAZER: When Michelle Obama suits up, formal and stuffy -- like, ahem, some former first ladies -- is not the vibe she's going for. With this strong-shouldered noir number by Azzedine Alaïa (above, left), she demonstrated that a sharp little jacket featuring classic men's tailoring can still be uber-feminine and unquestionably chic. Designer Sonia Rkyiel, whom Obama has worn in the past, gave us a great idea for a springtime upgrade (above, right). "This pre-Spring 2010 black crêpe de Chine jacket, a classic cut softened by a floral print with a little pop of color, would be a wonderful birthday gift," designer Rykiel told StyleList of her design; available at Ikram in Chicago, IL. Knowing Obama has a complete mastery of anything floral, we couldn't agree more.

Bejeweled necklines. Photos: Vladimir Rodionov/AFP/Getty Images | Courtesy of J.Crew

BOLD NECKLACE: Obama's flair for interesting jewelry has certainly been well documented. A particular favorite of late has been designer Dana Lorenz's Fenton-Fallon line. Over the summer while visiting Russia with the President (above), Obama opted for a one-of-a-kind piece by the jeweler. This spring, every woman can own the dangler that the First Lady wore on the cover of Glamour's December issue thanks to an exclusive collaboration with J.Crew. "I think this necklace is the perfect gift for her because she ultimately picks classic clothes and then pairs them with a great unexpected accessory," says the retailer's creative director Jenna Lyons. "This is the perfect necklace to pair with a classic cardigan or a shift dress to add a personal stylish touch."

Michelle Obama dazzles. Photos: Getty Images | Courtesy of Bochic

STATEMENT EARRINGS: When the First Lady complemented her Naeem Khan State Dinner gown with these stunning natural amber, rubellite tourmaline and rose-cut diamond oversized earrings (above, left), the fashion world took note. Especially, Bochic, the jeweler who created them. So, it's most fitting that the company picked out the perfect pair (above, right) for Michelle Obama to add to her spring gem collection. "The earrings are a rare combination of vintage 1940's Bakelite and hand carved lavender jade. The color, which is unique in nature, has a refined elegance reminiscent of that projected by the First Lady herself," Bochic co-founder David Joseph told StyleList.

Defining moment. Photos: Olivier Douliery/MCT | Neiman Marcus.com

BELT IT OUT: Great style is a cinch (literally) for the official fashion icon. Frequently opting to belt her ubiquitous colorful cardigans (often with a studded Azzedine Alaïa), Mrs. O brings a modern sensibility to the White House. She has been choosing wider silhouettes of late, like the intricate cut-out waist definer (above, left) which perfectly completes her sunny J. Crew ensemble. For spring, we selected this Oscar de la Renta satin corset belt in Freesia -- Michelle Obama is a huge fan of purple and we can already image her accessorizing endless possibilities: jackets, dresses, coats and her signature cardigans, of course.

Michelle's new spring 'do? This ethereal ponytail from Lela Rose's spring runway. Photos: Getty Images | Laura Kenney for StyleList

HAIR APPARENT: To update her look for spring, celebrity hairstylist Ted Gibson suggests Michelle take a runway-centric approach to her old standby -- the First Lady updo. He suggests updating her signature ballerina buns and chignons with the ethereal ponytail he created backstage at Lela Rose. "Its youthful, playful and sporty – which is just like who she is," he says. Gibson suggests, as a birthday gift, Obama wish for Ted Gibson Tame It Shine Lotion; its ease and versatility makes it a must with her busy lifestyle. "You can use it wet or dry to create softness, texture and movement in any hairstyle," says Gibson.

Michelle's beauty gift? Suggestions for her glowing skin and controversial brows. Photos: Getty Images | Courtesy of M.A.C

THE BEAUTY CABINET: Obama's beauty mark is her glowing complexion. To keep her skin in tiptop shape, Gordon Espinet, M.A.C's Vice President of Makeup Artistry, suggests Obama, who's already a fan of M.A.C's lipsticks, wish for the beauty company's new Care Blend Essential Oils. "I recommend Care Blend essential oils for ultimate hydration and comfort to the skin." Obama's one beauty sore spot are her hotly debated brows, which may have morphed since she's been in the spotlight. Espinet recommends "the new Penultimate brow marker... to style Madame Obama's perfect brows."