In the first Act, she is one of three fairies who narrate the story of the Queen but she appears as herself for the highlight of the evening for an acapella version of "Dancing Queen" with The Real Group.
The Ainbusk Singers with Josefin Nilsson also appeared on the show as did Orsa Spelman and many others.
Frida as
a fairy!
Thanks to Robin Andersson for information. Thanks also to Neil Barber and Paul Russell.