Question: What's black and white and red all over?
Answer: Ed Sheeran and Don McLean performing 'Vincent' together. And it's beautiful.
The two got together to perform the song as part of a fundraiser in the Pacific Palisades for UCLA Health and Teen Cancer America ... but before they hit the stage, they got together for a private rehearsal.
Sheeran brought the guitar -- and his finest red cargo shorts -- and strummed away while he and Don took turns with the verses.
72-year-old McLean was clearly impressed with his 27-year-old duet partner -- saying, "Ed is a quick study...turned out great"
By the way, 'Vincent' came out in 1971 -- 20 years before Ed was born!