What links Buddy Holly, Lyndon Johnston, Janice Joplin?

Question
What’s unusual about the moons of Uranus?
Answer
Named Shakespeare characters

Question
Where in your body is your patella?
Answer:
Knee ( it’s the kneecap )

Question
What word can mean a RC prayer Blood Clot extra calendar day?
Answer
Embolism

Question
What is a dzo?
Answer
Cow Yak cross

Question
Meridian is a shade of what colour?
Answer
Green