Both album were released in 2010. Teenage Dream is somewhere between 5-5.5M WW right now while Loud by Rihanna sold over 6M copies. Katy Perry's second album was discounted to 99c on Amazon last month and got a re-release called "The Complete Confection" with 3 new tracks produced by Doctor Luke. Both album have WW top 10 hit:
LOUD:
-Only Girl (In The World)
-What's My Name (ft Drake)
-S&M (ft Britney Spears)
-Cheers
Teenage Dream:
-California Gurls (ft Snoop Dog)
-Teenage Dream
-Firework
-E.T (ft Kanye West)
-Last Friday Night (ft Missy Elliott)
-The One That Got Away (ft B.O.B)
-Part Of Me
-Wide Awake (ft [to be announced])
Will TD outsell LOUD?