Britney Spears Sings “Happy Birthday” A Cappella: Watch

Britney Spears isn’t generally known for her vocal prowess, but she delivered an unexpectedly lovely a cappella rendition of “Happy Birthday” on Wednesday night’s episode of The X Factor. Surprising L.A. Reid in the judges’ green room with a cake lit up with candles, the pop star sounded a little shaky at first, but delivered a few satisfying vocal runs. For his part, L.A. looked delighted — maybe because Britney Spears just sang him happy birthday. Or because he just loves cake.

As noted here notes, the clip apparently marks the first time that Spears has been heard singing a cappella since her 2005 reality show Chaotic. The clip also makes this the first time we’ve ever had so many mixed feelings about someone singing “Happy Birthday.”

Watch Spears’ “Happy Birthday” above.