You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "who has been the most successful american idol?" whose answer is Carrie Underwood.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Kelly Clarkson success in music industry
Useful Output:

Doc 1: The singer-songwriter, now 36, has sold over 25 million albums and won three Grammy Awards. But Clarkson wasn't always in the spotlight and
Doc 2: ANYONE who thinks that Kelly Clarkson had 15 minutes of fame and criticize her because she happened to win a singing contest doesn't
Doc 3: Kelly Clarkson was the first "American Idol," and is still the show's biggest success. In fact, her second album has just gone double platinum.
Doc 4: Clarkson won season one of American Idol in 2002, a victory that propelled her to a successful career in music marked by three Billboard Hot 100
Doc 5: This probably comes as news to no one but check out this video of Kelly opening the 2019 Billboard Music Awards with a show-stopping medley,