Margarita Sierra (January 5, 1936 - September 6, 1963) was a nightclub singer and television star, as Cha Cha O'Brien on "Surfside 6", before dying at age 27 a day after heart surgery. Most episodes featured her singing, usually in English but occasionally in Spanish. One of her songs from the second and final season, "The Cha Cha Twist" was released as a single but did not enter the Billboard Top 100 chart. Wikipedia
For someone who only lived less than 27 years, Margarita Sierra had a long career in show business. www.tv.com/margarita-sierra/person/125447/biography.html
The definitive Wikipedia entry for Margarita Sierra. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Margarita_Sierra
Margarita Sierra - The Private Life and Times of Margarita Sierra. Margarita Sierra Pictures. Margarita Sierra is born in Madrid, Spain. Her parents are Jose and Maria Virginia Sierra.; Glamour Girls of the Silver Screen - The Private Lives and Times of S www.glamourgirlsofthesilverscreen.com/show/470/Margarita+...