'Mamma Mia' : Look what ABBA did in London

Thank you for the music, London's authorities might say, after Swedish pop group ABBA's digital concert residency raked in 178 million pounds ($225 million) in terms of net economic benefit to the British capital in its first year. ABBA Voyage recreates Bjorn Ulvaeus, Benny Andersson, Agnetha Faltskog and Anni-Frid Lyngstad as high-tech, digital versions of themselves from their 1970s heyday, thanks to motion-capture technology.