Since we're always on the lookout for great celebrity style, here's a round-up of this week's best-dressed. And since there are often fashion misses among the hits, we couldn't resist pointing out those looks that were better off left on the hanger.
Check out our latest installment to see which stars nailed it and who was a fashion mess. And don't forget to check back each week to see who made the cut.
- Best<p> 25 April: Duchess of Cambridge in Matthew Williamson at the <em>African Cats</em> premiere in London</p> <p> We love when Kate works her signature polished style with a bit of a twist - like this skirt suit with jewelled trim and peplum waist.</p> <div> </div>

- Worst<p> 21 April: Olivia Wilde in Prada at the Tribeca Film Festival’s Shorts Program: <em>Help Wanted</em> in New York</p> <p> This is a disjointed look from the usually polished actress. The lace dress looks messy around the waistline, the backcombed updo is a little severe and the footwear choice is way out of left field - and not in a good way.</p>

- Best<p> 22 April: Michelle Williams in Giambattista Valli at the Tribeca Film Festival after-party for <em>Take this Waltz</em> in New York</p> <p> On what has been one of the bleakest, rainiest weeks, we needed a little sunshine and Michelle's gorgeously patterned dress and effortless styling make us feel summery inside.</p>

- Worst<p> 25 April: Diana Vickers at the Carphone Warehouse Appy Awards in London</p> <p> This embellished dress resembles a collage and is about as flattering on the singer as being wrapped in paper with bits floating off it would be.</p>

- Best<p> 26 April: Charlize Theron in Dion Lee at the 2012 CinemaCon closing night ceremony in Las Vegas</p> <p> The star looks impeccable in this sexy illusion dress by designer Dion Lee, although by the looks of things, she doesn't have any flaws to conceal.</p>

- Worst<p> 23 April: Joan Collins at a Snickers promotion event in Hamburg</p> <p> This dated look with the bell sleeves and ruffled waist looks like an ABBA costume to us.</p>

- Best<p> 23 April: Fan Bingbing in Tadashi Shoji for the 2nd Beijing International Film Festival in Beijing</p> <p> Chinese actress Fan Bingbing deserves a special place in this week's best dressed for this sumptuous, perfectly executed ensemble. Not only is the draped velvet dress divine, hair and makeup look flawless and the accessories are well-coordinated and add a playful touch (just check out that Pagoda-shaped minaudiere).</p>

