ABBA fever hit Stockholm on Tuesday when a museum devoted to the Swedish pop legends opened -- filling a void in the hearts of millions of fans since the group disbanded three decades ago and likely to fill the pockets of Sweden's tourism industry too. "I'm so moved, I think it's so fantastic that we get to see the history of ABBA," said 46-year-old Swede Henrik Ahlen, who lives in London but came to Stockholm to be one of the first to tour the new museum.

The world's first museum dedicated to Sweden's iconic disco group ABBA is set to open in Stockholm on Tuesday, offering visitors a chance to get up close and personal with the 1970s foursome with a little help from modern technology. Fans have been eagerly awaiting the opening, with many sharing their excitement on the museum's Facebook page: "I'll be there," vowed Bea Schroeer of Berlin, while Alexander Kossovsky of Saint Petersburg wrote: "Can't wait to go!! Hurray! After all this time!!"

Psy's new single "Gentleman" has plunged in the US hit parade as the South Korean rapper struggles to repeat the success of his global chart-topper "Gangnam Style". "Gentleman" dropped to 26th place in the Billboard Hot 100, updated on Wednesday, from fifth last week and 12th on its debut a fortnight ago. Sales of "Gentleman" fell by 50 percent to 36,000. The music video of Psy's new single has been watched more than 267 million times on YouTube since it was posted on April 13, but Billboard only counts the number of views in the United States.

LONDON (Reuters) - A British bookmaker is taking bets on an ABBA comeback after singer Agnetha Faltskog hinted at a possible reunion for Sweden's most successful band. Faltskog, who has come out of retirement to release a solo album called "A", was asked by German's Die Zeit Magazine if she would be open to an ABBA reunion and she responded positively. "Maybe a charity concert? I would not say 'No' right away," she said.