Former member of Abba Agnetha Faltskog (c) attends the opening of Mamma Mia! The Party in Stockholm. Photograph: Jonathan Nackstrand/AFP/Getty Images

The four former members of Swedish band Abba reunited - albeit very briefly - for the opening of a new restaurant-entertainment venture in Stockholm. (...)

You don’t often see huge, permanent, stand-alone museums dedicated to popular culture, but the usual rules don’t apply to one particular Swedis(...)