In 2008 she also became a YouTube phenomenon with more than 1,5 million views in one year with her unique cover songs.
Thea sang the chorus and was featured on the song "Best Way" in 2010 with Torbjørn and Helfner. The song went to platinum and was played a lot on radio.
Her debut single "One Of A Kind" was released in August 2011. Her artist name was then Thea Oskarsen and the single became very successful in Norway. The song was written by Ina Wroldsen (Britney Spears, Shontelle, Leona Lewis) and David Eriksen (Jessica Simpson, The Saturdays, Lindsay Lohan).
In 2011 she also collaborated with the artists Dreamon and Kaveh, and they recorded the song "Minne" together. It was part of the hip-hop project "Gatekunst" which was funded by the Norwegian Royal Family. The song was very successful and received many good reviews.
Between 2011 and 2018, Thea has been busy in the studio recording background and reference vocals for many different norwegian artists (Tone Damli, A-Lee, Mo, Alexandra Joner etc). She also appeared on the song "180 Dager Sørpe" with the rappers Jaa9 & OnklP and the song "Halvfullt" with the rappers Erik & Kriss.
Thea Leora is currently working on new projects and releases for 2019.