In pictures: Samantha Cameron US fashion roundup

The Camerons arrive at Andrews Air Force Base outside Washington DC for the start of their official visit. She's in Burberry, Joseph and LK Bennett. We know there's a hot pink top under there, but Samcam isn't ready to reveal it Photograph: Rex Features First-lady footwear at a mini-Olympics event with local schoolchildren. Nice cropped action from Cameron, while Obama rocks a Gatsby-esque wide leg and some faux snake Photograph: Mandel Ngan/AFP/Getty Images In the pink corner, Brit designer Roksanda Ilincic. In the mustard corner, US designer L-Wren Scott. Result? A triumph for colour-blocking Photograph: Chip Somodevilla/Getty Images Hmm. This complimentary styling is starting to look less accidental as Obama's pale Zac Posen tailoring perfectly chimes with Cameron's tri-colour Roksanda Ilincic number Photograph: Jim Lo Scalzo/EPA Air punch from Victoria Beckham as Cameron debuts her next-season dress with baseball collars inspired by the wardrobe of Romeo Beckham Photograph: Stefan Roussseau/PA Cameron's Alessandra Rich sweet but solemn lace dress is a nod to the British fashion industry's cult eveningwear designer. Obama's teal Marchesa ticks the diplomatic box. The label is American but the designer is British Photograph: Carolyn Kaster/AP I'll see your lace pussey bow and I'll raise you a multi-string beaded necklace Photograph: Rex Features Proof that Cameron looks particularly at ease in cropped trousers. But it's the printed blouse that's the triumph here - buttoned up to the top is the approriate "fashion" way to style the blouse, and Cameron evidently knows this Photograph: Stefan Rouseau/PA The high neckline and the slim sleeve make this an appropriate silhouette for a respectful visit to Ground Zero. This one is by one of her favourite designers, Emilia Wickstead, but it does look remarkably similar to the grey Dior number that Carla Bruni-Sarkozy wore on a visit to the UK in 2008 Photograph: Stefan Rouseau/PA