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.
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- Worst<p> 24 March: Madonna introduces Avicii as part of Day Two of the Ultra Music Festival 14 in Miami</p> <p> No matter how fabulous that clenched buttocks of Madonna's is, we really prefer it when the Material Girl shows off her rock-hard bod in real clothes, not the tiniest of hot pants and arm warmers.</p>

- Best<p> 26 March: Karolina Kurkova in Stephane Rolland Couture at the Vienna Awards For Fashion & Lifestyle in Vienna</p> <p> Top models like Karolina pull off what, in theory, would be highly unflattering on mere mortals, like this chunky rope detail dress in a mustard hue. She looks exquisite, and we love the shoes and vampy lip.</p>

- Worst<p> 26 March: Chloe Sevigny in Proenza Schouler attends Jeffrey Fashion Cares 2012 in New York</p> <p> We love Chloe's quirky style and we want to get on board with this funky look but we just can't. Whether it's the mussed-up hair, sheer top or the kooky platforms, there's too much going on and something's not quite right.</p>

- Best<p> 28 March: Rihanna in Alexander Wang at the <em>Battleship </em>photocall in London</p> <p> We've said it before and we'll say it again: We love Rihanna's grown-up glamour girl-with-rocker edge style. Simply stunning.</p>

- Worst<p> 24 March: Kesha at the 26th Annual Genesis Awards benefiting The Humane Society in Beverly Hills</p> <p> This look is serious 70s overkill and while the orange lips and nails might be a cute touch, they're a bit excessive when teamed with the matching bag, belt and print.</p>

- Best<p> 27 March: Kate Winslet in Jenny Packham at the premiere of <em>Titanic 3D</em> in London<br /> <br /> Kate just oozes glamour in this look. From the impeccably coiffed hair to the English rose makeup to the pretty embellished Jenny Packham gown, she's head-to-toe perfection.</p>

