iTunes' top 10 selling singles and albums of the week ending Feb. 1 are:

Singles1. "Tik Tok," Ke$ha2. "Imma Be," Black Eyed Peas3. "Hallelujah (feat. Charlie Sexton)," Matt Morris, Justin Timberlake4. "BedRock," Young Money, Lloyd5. "Hey, Soul Sister," Train6. "Carry Out (feat. Justin Timberlake)," Timbaland7. "Bad Romance," Lady GaGa8. "In My Head," Jason Derulo9. "How Low," Ludacris10. "Need You Now," Lady Antebellum

Albums1. "Hope for Haiti Now," Various Artists2. "Need You Now," Lady Antebellum3. "The Sea," Corinne Bailey Rae4. "The Fame Monster (standard)," Lady GaGa5. "Contra," Vampire Weekend6. "The E.N.D. (The Energy Never Dies)," Black Eyed Peas7. "Animal," Ke$ha8. "iTunes Session," Colbie Caillat9. "2010 Grammy Nominees," Various Artists10. "Ultra Dance 11," Various Artists