The Demensions are an American doo-wop group formed in 1960 in the Bronx, New York. The group is recognized for their distinct harmonizing style, primarily under the lead vocals of Lenny Dell. Their most notable hit, "Over the Rainbow," reached number 16 on the Billboard Hot 100 in 1960, showcasing their signature blend of pop and doo-wop. Despite changes in the lineup, The Demensions continue to perform, contributing to the enduring popularity of the doo-wop genre.