'Dancing Queen' on display: ABBA museum opens in Sweden With no ABBA reunion in sight, patrons can take a chance on a new museum devoted to the 1970s Swedish pop super-group. Opening Tuesday in Stockholm, the museum will display band memorabilia, including star-shaped guitars, gold records, concert footage and the requisite hip-hugging flares -- except for a few "embarrassing" skin-tight costumes, band member Bjorn Ulvaeus told the Associated Press he omitted from the collection.