Tamar Mardirossian (Armenian: Թամար Մարտիրոսեան; born October 28, 1986), known professionally as Tamar Kaprelian, is an Armenian-American singer, songwriter, and philanthropist. Kaprelian began her career in 2008, after winning a cover contest organized by OneRepublic, performing "Apologize". Following her win, Ryan Tedder introduced her to Interscope Records executives, and she was signed to the label. She went on to release her debut studio album Sinner or a Saint in 2010 through Interscope.