Anita Darian (April 26, 1927 – February 1, 2015) was an American soprano and actress whose four-octave voice earned her the nickname "The Armenian Yma Sumac" and spawned an eclectic 50-year career that ranged from performances with the New York City Opera, Leonard Bernstein and the New York Philharmonic to big-band jazz concerts
Born Anita Esgandarian in Detroit on April 26, 1927 of Armenian-American descent, she studied opera at the Curtis Institute of Music in Philadelphia and the Juilliard School of Music in New York, but first came to popular attention as a featured singer with the short-lived Sauter-Finegan jazz band of the mid-1950s, with whom she recorded for RCA Victor. She settled in New York City and worked in everything from opera and classical recitals to television jingles and cartoon voice-overs. 
She recorded the Gershwins' musical "Lady Be Good" with Lehman Engel and the Belgium Radio Orchestra, which was broadcast nationally on NPR, and later participated in the recording of John Corigliano's eccentric electric-rock opera "The Naked Carmen," based on the original Bizet opera.Her solo albums included two classics of "exotica"-"Hawaiian Paradise" for Fidelio Records in 1959 and "East of the Sun," released by Kapp Records in 1960, which was especially praised for her versions of "Miserlou" and "Gomen Nasai".
Here's "Misirlou" from above album.
In 1961, millions of listeners heard her demonstrate her vast vocal range without knowing her name when she provided the swooping theramin-sounding counter-melody behind the tenor lead on the Tokens' No. 1 hit, "The Lion Sleeps Tonight".
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Two RCA producers, Hugo Peretti and Luigi Creatore, had engaged George David Weiss to fashion a more modern English -language adaptation of the South African folk song "Wimoweh" by Solomon Linda, and he brought Darian in to vocalize before, during and after the saxophone solo, using her eerie descant voice as another instrument. Originally intended as the "B" side of the Tokens single "Tina," it became one of the biggest-selling records of all time.
Her unique soprano was also heard as background on numerous other pop and R&B recordings, including Mickey and Sylvia's No. 1 hit "Love is Strange" and for such diverse artists as Burt Bacharach, Dinah Washington, LaVern Baker, King Curtis, Jane Morgan, Patti Page, Eddie Calvert, and Maxene Andrews of the Andrews Sisters
On Broadway, she was seen as Helen Chao in Rodgers and Hammerstein's "Flower Drum Song" and as Lady Thiang in both the 1960 City Centre revival of "The King and I" with Barbara Cook and Farley Granger and the 1968 City Centre production with Constance Towers and Michael Kermoyan. She had previously appeared with Cook in a 1956 live TV broadcast of the musical "Bloomer Girl.” Other stage roles included Maria Corona in the 1965 City Centre revival of Gian Carlo Menotti's "The Saint of Bleecker Street". 
In 1970, Leonard Bernstein cast her as Leonora in "Fidelio" for his celebration of Beethoven's 150th birthday at Lincoln Center, which was also broadcast on CBS-TV as part of the New York Philharmonic's "Young People's Concert" series. Darian had previously appeared on the program humming a kazoo in the Philharmonic's performance of Mark Bucci's "Concerto For Singing Instrument," which emanated from the stage of Carnegie Hall, conducted by Bernstein
Darian died on February 1, 2015, aged 87, at South Nassau Communities Hospital in Oceanside, New York, due to surgical complications. (Edited mainly from Broadway World.)