Rockapella is an American vocal group known for its unique blend of a cappella music, which means they perform without instrumental accompaniment. Formed in 1991, the group gained popularity through their appearances on the television show Where in the World Is Carmen Sandiego?, where they showcased their vocal harmonies and engaging performances. The members of Rockapella create a wide range of musical styles, including pop, rock, and traditional songs, all using only their voices. Over the years, they have released several albums and continue to tour, captivating audiences with their energetic shows and impressive vocal skills.