Complex sentence: They spawned the hits single "Just the Way You Are", "Grenade" and "The Lazy Song", the first two topped the Billboard Hot 100 and ushered The Smeezingtons into American pop songwriting and production.
Split into simpler sentences: They spawned the hit singles "Just the Way You Are", "Grenade", and "The Lazy Song". The first two of those topped the Billboard Hot 100 and ushered The Smeezingtons into American pop songwriting and production.