Complex sentence: "Don't Cha" achieved strong charting positions worldwide topping the charts in 15 countries including Australia, Canada, Ireland, New Zealand, Switzerland, United Kingdom and number two on the US "Billboard" Hot 100.
Split into simpler sentences: Don't Cha achieved strong charting positions worldwide topping the charts in 15 countries including Australia, Canada, Ireland, New Zealand, Switzerland and the United Kingdom. The song peaked at number two on the US "Billboard" Hot 100.