It looks like the Beckham family may have another musician on their hands. Monday marked Victoria's 43rd birthday, and her 5-year-old daughter Harper celebrated with a special serenade. The fashion designer uploaded an adorable clip of little Harper singing "Happy Birthday" to her while snapping her fingers. "🙏🏻 I love u @davidbeckham @brooklynbeckham @romeobeckham @cruzbeckham. 💕💕💕💕," she captioned it. Harper isn't the only musician in the family; her older brother, Cruz, often shares videos of himself covering songs on Instagram. Perhaps they'll team up for a duet in the future?