What have Miley Cyrus and a Dalek got in common? Well, they both make an appearance in BBC Radio 5 Live's online campaign to promote its World Cup coverage. The BBC Big Mexican Wave digital campaign invites users to join a series of stars and presenters in a giant Mexican wave by uploading their photos online. The concept borrows from the 'Eternal Moonwalk' campaign, but somehow doesn't quite manage to be as fluid and entertaining due to its stop motion effect. That said it can be shared both on Facebook and Twitter and doesn't require any deep commitment from those who want to take part.