Iwan started singing at school and university. After performing his military service, he started composing songs for other singers like Bassima, Fares Karam, Carole Samaha, Reeda, Ghadi, Nisreen, Maria, and Nora Rahal. Later in 2003, he wrote the lyrics of his first song, “Oul Inshallah”, which is the remake of “Deste Mou Ta Matia” by the Greek singer Despina Vandi, then he shot his first video clip for this song with Lebanese director Walid Nassif, the song became one of the biggest hits in the Middle East in that year and introduced Iwan as a new image in the Arab pop scene.
In 2004, Iwan released his second single, "Zanby Ehi?", the song was written and composed by Iwan himself and increased his success especially in Egypt. later in November 2004, he released his debut Albi Sahran with two singles from it, "Albi Sahran" and "Ahlan Wa Sahlan".Iwan won the platinum record for the sales of this album, and won at the same year the Arabian Music Awards that was held in Dubai for the best new Arab male artist over all.
In 2006, Iwan released two single "Wala fil Ahlam" and "Libnani" which was written and composed by Iwan himself, the songs where directed by Jad shwery and made a success especially "Libnani" which was released after the 2006 war in Beirut, the song and its clip were about the beauty of Lebanon's nature, culture and musical icons.
In August 2007, Iwan's second album was released, titled Erga' Leya and few weeks later, a video of the album's first single "Khadtaha", directed by Yehia Saadeh, was released exclusively on Melody Music channels, the clip was a big success but the song did not make the same impact compared to his previous songs.
In 2008, he released a single with Amal Hijazi called "Khalina Ne'oul", which became a quick hit in Lebanon and other Arabic countries.
In 2009, Iwan starred his first movie, Haflet Zefaf, which was released in summer of 2009
In March 2010, Melody released a single by Iwan, titled "Akbar Kidabe". the song was composed by Iwan and It is said that this song will also be released on Iwan's third studio album.
Iwan was born on August 16, 1980, in Sidon, Lebanon. He is the eldest son of his Lebanese father Marwan Baassiri and his Syrian mother Dahouk. He has two brothers, Mazen and Haitham and one sister, Rasha. Iwan holds a degree in Hotel Management from the Lebanese University. It was said that he is also preparing for his Master of Business Administration (MBA) degree. Iwan got married in secret in 2008 and got divorced at the end of 2009 and refused to talk about this subject with the media.
He shares his birthday with American pop icon Madonna and it is said that he is a huge fan. He performed a cover version of "Justify My Love" in concert in Beirut in 2013 which sparked controversy.2004: Albi Sahran
2007: Erga' Leya
2009: Haflet Zefaf