Kerli started classical piano training when she was 8 but quit when she was 14 to pursue singing.
During her performance at Õllesummer, Kerli stood on a platform which then rose with a poll to very high height and the poll was originally attached to the platform with one screw and had a note attached it which stated "Motherfucker, don't get on this piece of shit, you'll die". Although the problem was corrected, Kerli said she was "scared shitless" and that her legs were "shaking like crazy" but it wasn't visible under the dress.
The first lyrics she ever wrote were "I must be fool when I believed the road was open. I must be fool, 'cause now I see my heart is broken" when she was 11 and did not speak English well.
When Walking On Air was iTunes' "Free Single of the Week", it was downloaded 550,000 times, making it the most downloaded "Free Single of the Week" ever.