Jacoba Adriana Hollestelle, better known as Conny Vandenbos, was a Dutch singer who represented the Netherlands in the Eurovision Song Contest 1965 in Naples, Italy with the song 't Is genoeg, which finished in 11th place. She made her solo debut in the KRO-Springboard radio show, a show case for young talent, in which she performed French chansons. After her performance in the Belgian Knokkefestival of 1961 Conny signed a recording contract at Philips Phonogram. In 1964 she made a television series "Zeg Maar Conny" ("Call me Conny") for the Dutch public broadcaster NCRV.