Driving on the right hand side of the road. Eating pancakes for breakfast. Saying "faucet" instead of tap. Just a few of the way in which the Americans differ to us Brits.
And then there's the football matches...sorry, soccer matches. Whilst here in Blighty, footie matches generally involve pot-bellied men drinking lager, eating pies and slagging off the rival team at the top of the voices, they do thing a little differently in the good ol' US of A - especially when LA's hottest hunk, David Beckham, is playing his first game for new team LA Galaxy against old rivals Chelsea. The stars turned out en masse for the spectacle (which is the only word to describe the event), posing and pouting for the waiting paparazzi (paparazzi? At a football match!?). Amongst the best dressed in attendance was Mary-Kate Olsen, who looked the archetypal footie fan in skinny jeans, rock tee, sky-high platform heels and Prada Fringe bag.
Also clutching a VIP pass was actress Alicia Silverstone, who looked slightly more casual (but just as "not-here-for-the-footie-here-for-the-show") in a great green tee - loving this colour on her - with a printed leopard motif, a casual pair of jeans and nude peep toe heels.
Once the match was over (Galaxy lost 1-0, if you're at all interested, with Beckham only on the pitch for 13 minutes), it was On With The Show! The Beckhams' NBFs Tom and Katie Holmes joined forces with funny man Will Smith and wife Jada Pinkett-Smith to host a "Welcome to LA" party for David and Victoria. Being the guest of honour (and, erm, Victoria) Posh opted for a show-stopping black tutu style mini dress paired with a towering pair of raffia heels, whilst David wore a smart grey suit and a big cheesy grin.
The party attracted everyone who's anyone in World Celeb, with songstress Rihanna turning out in a trés on-trend high-waisted skirt worn with a sequinned vest and pointy black heels. Newlywed Eva Longoria was also in attendance, looking all loved-up and glowing in a yellow puffball dress and contrasting green heels.
From LA to Weston-Super-Mare (oh, the glamour) - this side of the Atlantic T4 on the Beach took place and, from the looks of things, celebs are already working next season's trend of nipped in waists. Posh popster Sophie Ellis-Bextor chose a bright pink belt to cinch in her monochrome printed mini dress (which, in the blustery conditions, left her rather red-faced we're sorry to say), whilst Natasha Beddingfield wore a thick metallic belt over her bright blue dress and leggings.
And finally...we couldn't today's round up of celeb outfits without mentioning the fabulous Debbie Harry. Performing with Blondie at this weekend's Lovebox festival in London, the 62-year old proved style is ageless as she rocked the stage in a great black and white stripe dress with an electric blue shrug and white sunglasses. The original punk princess - what a legend.