Stars including Gwen Stefani, Barack Obama, and Robert De Niro all have Irish ancestors.

Joanie Madden founded the Celtic supergroup Cherish The Ladies. She tells us about what she calls "March Madness" for Irish musicians and the song that's most meaningful for her to play this year.

Boston, get ready to say “dia duit” to Seisiún, a new Irish festival coming to The Stage at Suffolk Downs later this year.