Yes, the 'Guest List' is awful! Shayne Ward won the X Factor in 2005, & he can no longer sell Records. Alexandra Burke won it in 2008, & she can't sell Records any more.
Susan Boyle came 2nd in the 2009 Britain's Got Talent, & she can only sell a tiny fraction of the Albums that she was able to sell in 2009 and 2010.
Apparently, Bjorn is interviewed in the 'Show'. I wonder if he realizes that the Guest List is full of 'has-beens'. It may as well be The Smurfs Christmas Party, considering the current status of the Guests that ITV has gathered together!
However, whilst I'm not expecting more than a 3.5 Million to 4 Million UK Audience for it, it will promote ABBA, which is the main thing, I guess. (Although it will be a tiny viewing Audience considering that there are over 65 Million people in the UK. There was a time when ABBA got 10 Million & 11 Million UK viewers for every UK TV Show about them.....Not just in the 1970's, but as late as 1999 & 2000 etc.).
What were they thinking at ITV? It's still being broadcast as I write. Absolutely painful viewing. Z-list celebrities murdering the ABBA classics. Not a note between them. Only positive is Bjorn looking so well and lots of interview segments. Overall, probably the worst ABBA related TV show on prime time mainstream ever. Brutal.