Lol. Are you kidding me? Her album has been out since October 2014 and she currently has the #2 best selling album this week. Most albums fly out the Billboard Top 200 after a couple of months. The fact that she is STILL Top 5 after eight months is unreal!
No, the fact that Pink Floyd's Dark Side of the Moon was on the Billboard Top 200 for 741 straight weeks from 1973 to 1988 is unreal. 8 months pales by comparison. Appetite for Destruction, another fairly big album spent 147 weeks, almost 3 years on the Top 200, from 1987 to 1989.