In fact, she’s got her heart so set on the show that she’s willing to do anything to be a part of it — even work in costumes ...

Mamma Mia! Here We Go Again' is now available digitally and arrives on Blu-ray and DVD on Oct. 23. ET exclusively sat down with the singer to talk about her new 'Dancing Queen' album of ABBA ...

Be forewarned ... attending next week's Cloquet High School production of "Mamma Mia!" will have Abba songs running through ...