Triinu Kivilaan (born 13 January 1989 in Viljandi, Estonia) is an Estonian vocalist and former model, best known as a former member of the popular girl group Vanilla Ninja.

Kivilaan was (by several years) the youngest member of the group, and continued with her education despite Vanilla Ninja's busy schedule.

When Kivilaan joined the group, Vanilla Ninja had already been chosen to represent Switzerland at the Eurovision Song Contest 2005.

For a while it looked like the group would have to withdraw, but the fact that Kivilaan would reach her 16th birthday four months before the Contest meant that the European Broadcasting Union allowed the girls to compete.

Kivilaan would eventually leave Vanilla Ninja in December 2005, with the other three members (Lenna Kuurmaa, Katrin Siska and Piret Järvis) deciding to continue as a trio.