This 'Mamma Mia!' HIIT workout feels like a dance party
ABBA will release 5 new songs next year and go on a hologram tour
Cher is releasing a whole album of ABBA covers
Watch Amanda Seyfried Sing 'Dancing Queen' With A Twist On Jimmy Fallon
Trailer for 'Mamma Mia! Here We Go Again' is here
Cher is officially joining the cast of the 'Mamma Mia' sequel
A "Mamma Mia" movie sequel is in the works