Question about the Jubilee...

CNN showed a picture of Brian May (with that same old guitar he built in high school that he's never changed) on the roof, playing "God Save The Queen". However, CNN reported on the photo caption that he "sang" it, and I thought he was best known for his instrumental version of that piece of music.

I'm curious, did he sing it, or did he do an instrumental and CNN just got the caption wrong?