I want to know the answer to the following question:
Whose recording of Hallelujah became successful again after being performed on American Idol?
All the background I'm provided with is that "This was the first season in which contestants' recordings were released onto iTunes after their performances, and although sales information was not released so as not to prejudice the contest, leaked information indicated that contestants' songs frequently reached the top of iTunes sales charts.". Is that enough to answer the question?
Answer: no