"Mistletoe" by Justin Bieber is a Christmas-themed pop and R&B song released in October 2011 as the lead single from his holiday album Under the Mistletoe. The song features a relaxed reggae beat with festive sounds like jingle bells and bongos, creating a warm, cheerful holiday atmosphere. It captures the feeling of romantic moments during the Christmas season, with lyrics focusing on spending time with a loved one under the mistletoe, reflecting themes of love and togetherness during the holid