context: DioGuardi has worked with many popular artists; sales of albums on which her songs appear exceed 160 million worldwide.
source: DioGuardi served as a judge on American Idol for its eighth and ninth seasons.
reference_original: DioGuardi è stata giudice dell'ottava e la nona stagione di American Idol.
reference_flipped: DioGuardi è stato giudice dell'ottava e la nona stagione di American Idol.