Their selection and participation in the contest was put into jeopardy soon after the announcement , though , after Maarja Kivi left the group due to becoming pregnant with her first child . Her replacement was Triinu Kivilaan , who at the time was only 15 years old . Their participation was put into doubt due to regulations stating that competitors must be at least 16 years old , a rule introduced to eliminate participants such as the 13-year-old 1986 Eurovision winner Sandra Kim . Kivilaan had in fact initially claimed to be 17 years old , but the Swiss selectors doubted this and eventually found out her true birth date was January 13 , 1989
1986 Eurovision
Eurovision Song Contest 1986
Vanilla Ninja