debuted at number 75 during the week of September 25, 2004, and later reached the peak of number 58. In the UK, the single debuted at number five on the UK Singles Chart on November 28, 2004, and later became its peak position. The song also gained commercial success in regions including New Zealand (number four), Australia (number five) and Denmark (number eight). It was certified Platinum by the Australian Recording Industry Association (ARIA), and Gold by the Recording Industry Association of America (RIAA). Track listings CD single and digital download single"Tilt Ya Head Back"– 4:13 "Na-NaNa-Na" – 3:5912-inch vinyl"Tilt Ya Head Back" – 4:13 "Flap Your Wings (Full Phatt Remix) – 4:18Digital download EP' "Tilt Ya Head Back" – 4:13 "Na-NaNa-Na" – 3:59 "Flap Your Wings (Full Phatt Remix)" – 4:18 Charts Weekly charts Year-end charts Certifications References External links 2004 singles 2004 songs Christina Aguilera songs Male–female vocal duets Music videos directed by Director X Nelly songs Songs written by Nelly Songs written by Curtis Mayfield Universal Music Group singles