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 sang don't worry be happy first?" whose answer is Bobby McFerrin.
Each document should contain about 30 words, and these documents should contain useful information.

Query: who sang don't worry be happy first
Useful Output:

Doc 1: Bobby McFerrin is a true one-hit wonder; “Don't Worry, Be Happy,” his sole #1 hit, is also the only McFerrin song that's ever charted on the Hot
Doc 2: Six weeks before it topped the Hot 100, Bobby McFerrin's “Don't Worry Be Happy” became the ultimate left-field #1, 30 years ago this week.
Doc 3: Bobby McFerrin was the one who sang “Don't Worry, Be Happy.” That song topped the Billboard Hot 100 charts on Sept. 24 and Oct. 1 in 1988.
Doc 4: The song was first released in 1988 as part of Bobby McFerrin's “Simple Pleasures” album. It was also included on the soundtrack for the film “
Doc 5: Bobby McFerrin's "Don't Worry, Be Happy" was inspired by a famous Muslim mystic who famously did not speak for several decades.