There's a lot to love about the April issue of Vogue. First, we have the long-awaited cover story of flame-haired Rihanna, shot by Annie Leibovitz. There's also a heartfelt and quite candid editor's letter penned by Anna Wintour, dedicated to Grace Coddington in honor of the creative director's 70th birthday. "Grace is always thinking about the human being at the core of the photograph," Wintour writes. Perhaps our favorite feature of this issue is the fresh profile on pint-sized moguls and 2011 CFDA Award nominees, Mary-Kate and Ashley Olsen. Here are some choice quotes from the piece.

The Resort 2011 collection of the Olsen twins' The Row clothing line maintains a focus on top-quality fit and fabrics. Fans of the line will find designs that feature drapery on a modern ankle-length black dress or flowing floor-length white frock. Transforming basic types of tops and trousers, their clothing this season continues to be menswear-inspired, with oxford blouses buttoned up to the neck, collared shirts peeking out from slouchy heather gray sweaters, and matching blue tweed pantsuits of tightly fitted mini blazers paired with low-slung pants that hit at the ankle. The overall influence of the collection is a bit of business-wear formal with a hint of comfy, easygoing '90s grunge.

● Mary-Kate Olsen says she "would never wish my upbringing on anyone," calling herself and sister Ashley "little monkey performers." You got it, dude! [HuffPo] ● Heidi Montag, who recently filed for divorce, is now spending time watching old episodes of The Hills, tweeting at her ex-friends, and doubtlessly drying her tears with dollar bills. [TV Watch] ● Both Jennifer Aniston and Julie Roberts are channeling Barbra Streisand in new magazine photoshoots, leading many to wonder, "Who wore it better?" and just about everyone to wonder, "Why?" [Celebuzz]

So the "no pants" trend has been making waves for what feels like a full fashion lifetime. But, thanks to the new Olsens lookbook for The Row, there's a new garment-less trend: no shirts. In an aboriginal-themed shoot, Mary-Kate and Ashley showcase SS10 wares from their higher-priced fashion line (Elizabeth & James retails at a slightly cheaper price point). Included in the mix: light-wash boyfriend jeans (a dead ringer for vintage Levi's), silk slip dresses, leather shorts, a sheer black mumu of which Stevie Nicks would surely approve, and black satin as blouses and a trench coat. Also included: sunglasses from the Olsen's premiere optics line, which likewise debuts in spring.

Project Runway alumnus (who will soon be returning to the tube via a new Valentino-esque reality series) Christian Siriano is just shy of the debut of his second collection for Payless. But the photos of his labor hit the web yesterday, promising quite a few very cute, very, very cheap styles for the line's launch in time for the holiday season. Styles include "two pair of flats with zippers on the toes, two boots with gold zipper details, and a pair of black and gold pumps and shiny black strappy sandals, both with little gold zippers up the backs," says Racked. All heels come in an attractive upside-down cone shape and are decidedly more demure than the talon-like shoes that made their way down Siriano's well-received SS10 catwalk. The best part: "nothing's more than $49.99."

Spring 2010 is the season to launch a sunglasses line. That is, if you're Alexander Wang, the Olsen twins, or Diane Von Furstenberg. While Wang showcased his premiere line of specs on his football-inspired SS10 runway at New York Fashion Week; the Olsens just released images of their soon-to-debut sunglasses, which they created in collaboration with seasoned design house Linda Farrow. Now DVF is adding the accessory into the brand's repertoire for spring. Even though images have yet to surface, the company's Facebook page confirms that the designer (who was recently mugged in Madrid, but fortunately ended up safe and sound) is thisclose to her eponymous eyewear launch: "Just wrapped our eyewear shoot ... stay tuned for behind the scenes photos (and the eyewear launch in November!)."

● Is Lindsay Lohan picking over Sienna Miller’s sloppy seconds? Lindsay was evidently late to her court appearance last week because she was making out with Balthazar Getty at a club till the wee hours of the morning. [Dose] ● Blue Bloods, the vampire TV vehicle Mary-Kate Olsen was to star in for the CW, was not picked up because it was too similar to Gossip Girl. Er, OK. [Limelife] ● K2 Productions, which directs the Miss California USA pageant, is suing Carrie Prejean to get their breast implants back -- or at least the $5,200 they paid for them. [E!]

Despite accolades for her fashion work, the tabloids haven't been kind to Mary-Kate Olsen. To be fair, they’re not really kind to anyone, but they’ve been especially cruel to her. It’s almost as if they want to push her back over the edge into full-blown anorexia so they can do another eight months of “Scary Skinny” coverage and speculate about how low her weight has dropped this time around.

Style pieces surrounding the Olsen twins' often inimitable aesthetic are a dime a dozen. But in recent history, few editors have taken it upon themselves to look at the millionaire actress-turned-entrepreneur twins' two separate clothing lines -- The Row and Elizabeth & James -- through a thoughtful and critical lens. This is exactly the reason Cathy Horyn's new in-depth profile of the design duo comes as such as surprise. But designers they are (Mary Kate and Ashley were recently inducted into the CFDA), and, in terms of sales, they have proven a sartorial success story.

● Joaquin Phoenix makes everyone, including Dave Letterman, feel awkward during his interview to promote his new film. Begging the question (again), is this grizzly-man/rapper thing a performance art piece? [Youtube] ● Mary-Kate Olsen plays model for the new issue of Interview. Check out the pictures, interviews, and behind-the-scenes video. [Interview] ● Writer-comedian Sara Barron is about to release her memoir People Are Unappealing, a sort of The Devil Wears Prada for the cooking world. Among the sordid details, she reveals a few unpleasant stories about R.E.M.’s Michael Stipe. [P6]