What's the Kennection? #37

Welcome to Kennections, a weekly quiz created by Jeopardy! champion/co-host Ken Jennings. Here's how to play: All five answers to the questions below have something in common. Can you figure it out? (Note: We've given you a hint by showing you how many letters are contained within the answer, but this quiz is not interactive.)

1.  The Pacific island Mas a Tierra has been renamed for what 1719 novel, because sailor Alexander Selkirk was marooned there four years?

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2.  What dancer played the title character in the 1951 Best Picture winner An American in Paris?   

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3. What’s the only kind of bird that can swim but cannot fly?

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4. What music superstar is also Barbados’s national ambassador for culture and youth?

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5. What 2004 stage musical added new songs like “Cherry Tree Lane” and “Practically Perfect” to 1960s-era classics like “Chim Chim Cher-ee”?

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