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Pétur Örn Guðmundsson (b. 1971) is an Icelandic singer-songwriter who voiced Ernie in Ævintýri Berta og Árna, the Icelandic dub of Bert and Ernie's Great Adventures. He also voiced Ernie and Kermit in Hopp og hí Sessamí, the Icelandic dub of Play with Me Sesame.
He is a member of the Pink Floyd tribute band "Dúndurfréttir."
He has participated in the Eurovison song contest multiple times as a backup singer for the Icelandic contribution for the contest. In 2013, he wrote the song "Ég á líf", that ended up representing Iceland that year at the main contest.