Heo, 20, beat out three other finalists in the program, which was aired on Tuesday, according to DSP Media.
The group, composed of Gyuri, Seungyeon and Hara in addition to (Heo) Young-ji, plans to release a new album in August and embark on a concert tour to Japanese cities in October, it said.
KARA had been a three-member band since Kang Ji-young and Nicole bolted from the group in January.
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