I believe Frozen is now tied for 10th for most weeks in the T5 during the Soundscan era, with 30 weeks.
The list is mostly clumped together closely, so if it gets just 5 more weeks it'll only be behind Adele and Alanis.
For this century, it already has the 2nd-most weeks for that, T2, and #1. Behind Adele on each count.
This is why Sia didnt deserve the no1 spot. she just snatched it at a weak time. Meanwhile Sam may never be able to say he's had a no1 album despite consistently good sales and longevity.
Sia's drop is a pretty typical drop for new albums nowadays. It's just that she topped the charts with an incredibly low amount, so it just looks really bad on the surface when it's nothing outrageous at all.
KING 
@ Lana flopping...