Singer Katy Perry performs (with her sharks) during the Super Bowl XLIX halftime on Feb. 1, 2015. Timothy A. Clary/AFP/Getty Images hide caption
David Greene David Greene is a host of Morning Edition and Up First.

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North And South Korea Find Common Ground For Pyeongchang Winter Olympics
Otis Redding performs on the British TV show Ready Steady Go in 1966. Michael Ochs Archives/Getty Images hide caption