Baccara was a female vocal duo formed in 1977 by Spanish artists Mayte Mateos and MarÃa Mendiola . The pair rapidly achieved international success with their debut single "Yes Sir, I Can Boogie", which reached number one across much of Europe and is one of the best-selling singles of all time. A successful follow-up single and European tour led to a number of album releases, numerous television appearances and the duo's selection to represent Luxembourg in the Eurovision Song Contest 1978.