Do your favorite albums by these artists are also considered to be their magnum opi? If you disagree with my picks, feel free to discuss, though none of these are my opinion but the general consensus I have picked up on as an avid consumer of pop-adjacent music. Without further ado, the list of magnum opi (in some cases, I have listed two, highlighting the most likely contender):
Adele - 21 (my favorite as well)
Björk - Homogenic (my favorite is Debut)
Beyoncé - Lemonade (my favorite is 4)
Britney Spears - Blackout / In the Zone / (my favorite is In the Zone)
Carly Rae Jepsen - E*MO*TION (can't pick one)
Christina Aguilera - Stripped (don't have one)
Janet Jackson - The Velvet Rope (don't have one)
Katy Perry - Teenage Dream (don't have one)
Lady Gaga - The Fame Monster / Born This Way / (my favorite is Born This Way)
Lana Del Rey - Norman F-cking Rockwell! (my favorite is Honeymoon)
Lorde - Melodrama (my favorite is Pure Heroine)
Madonna - Ray of Light / Like a Prayer / (my favorite is Music)
Mariah Carey - Butterfly (my favorite is Mariah Carey)
Taylor Swift - 1989 / Folklore / (my favorite is Red)