iTunes' Official Music Charts for the week ending September 15, 2014: Top Songs 1. All About That Bass, Meghan Trainor 2. Shake It Off, Taylor Swift 3. Bang Bang, Jessie J, Ariana Grande & Nicki Minaj 4. Centuries, Fall Out Boy 5. Anaconda, Nicki Minaj 6. Black Widow (feat. Rita Ora), Iggy Azalea 7. Maps, Maroon 5 8. Rather Be (feat.