iTunes offers five hit albums for $6.99 this weekend

If you needed to pick up Katy Perry's Teenage Dream or Ke$ha's Cannibal to make your 2011 music collection complete, now would be the time. Apple is promoting those two albums and three more with a $6.99 sale through January 24.

These and more are featured in iTunes' Albums Under $8 section -- and, as the mailer points out, they're a great way to chew through those iTunes gift cards that showed up under the tree.