What is philadelphia international records best selling single?

Philadelphia International Records' best-selling single is "Love Train" by The O'Jays. Released in 1972, the song became a massive hit, reaching No. 1 on the Billboard Hot 100 chart and selling over a million copies. It is often celebrated for its infectious melody and powerful message of unity and love. The success of "Love Train" solidified the label's reputation in the soul and R&B genres.