Complex sentence: "Stand up For Love", which failed to appear on a major music chart, and "Check on It", which reached number one on the US "Billboard" Hot 100 and the top ten on many European charts.
Split into simpler sentences: Stand up For Love and "Check on It". The former failed to appear on a major music chart, while the latter reached number one on the US "Billboard" Hot 100 and in the top ten on many European charts.