Here are the iTunes' top 10 selling singles and albums of the week ending January 18:

Singles:

1. "Tik Tok," Ke$ha

2. "Hey, Soul Sister," Train

3. "BedRock," Young Money, Lloyd

4. "Bad Romance," Lady GaGa

5. "Blah Blah Blah (feat. 3OH!3)," Ke$ha

6. "Replay," Iyaz

7. "Empire State of Mind (feat. Alicia Keys)," Jay-Z

8. "Fireflies," Owl City

9. "Sexy Chick (feat. Akon)," David Guetta

10. "Naturally," Selena Gomez & The Scene

Albums:

1. "Contra," Vampire Weekend

2. "Animal," Ke$ha

3. "The Fame Monster (standard)," Lady GaGa

4. "Soldier of Love," Sade

5. "Ocean Eyes," Owl City

6. "The E.N.D. (The Energy Never Dies)," Black Eyed Peas

7. "Battle Studies," John Mayer

8. "The Best of Sade," Sade

9. "The Element of Freedom," Alicia Keys

10. "The Love Uncompromised," Jason Castro