Complex sentence: The song sold 448,000 digital downloads in three days, the most downloads in a first week by a female artist, beating the previous record held by Britney Spears' "Hold It Against Me".
Split into simpler sentences: The song sold 448,000 digital downloads in three days, the most downloads in a first week by a female artist. The record was previously held by Britney Spears' "Hold It Against Me".