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 did the super bowl halftime show 2017?" whose answer is Lady Gaga.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Super Bowl 51 halftime show 2017
Useful Output:

Doc 1: Super Bowl LI Halftime Show Starring Lady Gaga: Directed by Hamish Hamilton. With Lady Gaga, Graham Breitenstein, Day'nah Cooper, Ashley Cruz.
Doc 2: Lady Gaga performing at Super Bowl LI Halftime Show. Halftime performer + Full time pop singer + Emerging NFL Player.
Doc 3: The spotlight centered on Lady Gaga, who was the headliner for this year's halftime show. Gaga's performance included her rappelling to the stage from the top
Doc 4: Lady Gaga delivered an explosive greatest hits medley at the Super Bowl 51 Halftime Show. The pop chameleon tore through “Poker Face,” “Born This Way,” “
Doc 5: Comments23 · Lady Gaga - Pepsi Zero Sugar Super Bowl LI Halftime Show · Lady Gaga LIVE Super Bowl LI Halftime Show (with STAGE BUILD) · Lady Gaga