Fearless - 58 weeks
Some Hearts - 31 weeks
Recovery - 27 weeks
Breakaway - 23 weeks
Encore - 17 weeks
Prism - 16 weeks
Pure Heroine - 15 weeks
Speak Now - 15 weeks
Pink Friday - 14 weeks
Curtain Call: The Hits - 12 weeks
The Marshall Mathers LP 2 - 12 weeks
Loud - 12 weeks
Metamorphosis - 12 weeks
Teenage Dream - 11 weeks
Under My Skin - 11 weeks
Circus - 9 weeks
Relapse - 8 weeks
Play On - 8 weeks
Bangerz - 8 weeks
In the Zone - 7 weeks
The Best Damn Thing - 7 weeks
Femme Fatale - 5 weeks
That's about a year and half. 
