U Smile - Justin Bieber

Entered the US chart on 03 April 2010 and spent 1 week in the charts, reaching a high of number 27.
Entered the UK chart on 28 March 2010 and spent 1 week in the charts, reaching a high of number 98.
Re-entered the US chart on 02 October 2010 and spent 1 week in the charts, reaching a high of number 95.
Re-entered the US chart on 05 March 2011 and spent 2 weeks in the charts, reaching a high of number 94.