Ain't It Funny - Jennifer Lopez featuring Ja Rule

• Entered the US chart on 29 December 2001 and reached number 1. Spent 27 weeks in the charts (6 weeks at number 1).
• Entered the UK chart on 19 August 2001 and spent 8 weeks in the charts, reaching a high of number 3.
• Re-entered the UK chart on 21 October 2001 and spent 1 week in the charts, reaching a high of number 59.
• Re-entered the UK chart on 17 March 2002 and spent 13 weeks in the charts, reaching a high of number 4.

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