[4] Jaani first became publicly known in Estonia in 2009 as a participant in the third season of Eesti otsib superstaari, the Estonian version of Pop Idol.

She finished fourth and her performance gained her role of Sharpay Evans in the Estonian version of High School Musical.

Jaani represented Estonia in the Eurovision Song Contest 2011, with her entry "Rockefeller Street" coming in 24th place in the final.

In 2012, Jaani presented the scores on behalf of Estonia for the grand-finals of the Eurovision Song Contest 2012 in Baku, Azerbaijan.

Jaani spoke out about this in 2019 on "etv", "When I heard the new version which is a lot faster, the original Rockefeller Street seems like a great lullaby next to it."