Complex sentence: Corbett commented on "The Late Late Show with Craig Ferguson" that many people perceive him to be dating a much older woman in Bo Derek, whereas she is only about 5 years older than Corbett.
Split into simpler sentences: Corbett commented on "The Late Late Show with Craig Ferguson" that many people perceive him to be dating a much older woman in Bo Derek. Derek really is only about 5 years older than Corbett.