Seán Hegarty (born 25 June 1968), better known by his stage name Marc Roberts, is an Irish singer, best known for representing Ireland in the Eurovision Song Contest in 1997.

He is originally from Crossmolina, County Mayo, and now based in Galway, where he presents a local radio show as well as continuing his singing career.

[4] Around this time, Roberts joined local radio station Galway Bay FM as a guest presenter.

Performing a three-hour afternoon show, 12pm to 3pm each Saturday, & Sunday 12pm to 1:30pm, called The Feel Good Factor, he continues in this role as of 2018.

[5] In 2006, Roberts emerged as a songwriter by co-writing a number of songs on singer Daniel O'Donnell's album, Until the Next Time.