John Mayer is the latest male crooner to take on a Beyonce song. He performed "XO" during his April 15 concert in Australia with only a guitar and harmonica. A few days before he introduced the cover, Mayer tweeted that "XO" is "real and raw" -- and his acoustic folk rendition seems to emphasize that, plus all the über-seriousness that Mayer embeds in his music.
The best thing about Beyoncé? The break in her voice on the first "baby, love me lights out" in XO. Real and raw.
— John Mayer (@JohnMayer) April 13, 2014