Just days after denying accusations that she lip syncs, Britney Spears gave an a cappella rendition of "Happy Birthday" to her bodyguard of five years at her Friday night concert in Singapore. Spears is currently on her ninth concert tour following a break from her Las Vegas Residency "Britney: Piece of Me."
If this does not prove she has a spectacular vocal range, then we do not know what does. She belts out the notes and shows off her sexy voice.
Watch the video below to see for yourself: