Raised in a house full of music in Co.Meath, Caitlín learned most of her music from her father Antóin Mac Gabhann, a noted fiddler and fiddle teacher and his playing has greatly influenced her style and rhythm. Three time All-Ireland champion on concertina, Caitlín is a regular performer at festivals and in concert halls from North America all the way to Asia. She is also an accomplished dancer and has toured the world with Riverdance as a troupe dancer. Writing tunes since the age of ten, her compositions have been performed in the Cork Opera House and The National Concert Hall, Dublin and recorded by renowned musicians in Ireland and abroad. She teaches concertina annually at summer and winter schools in Ireland, Europe and USA and has performed with the RTÉ Vanbrugh Quartet, Paddy Keenan, Liam Ó Maonlaí, for Presidents and Royalty around the world, most recently at 'Ceiliúradh' in the Royal Albert Hall, London as a guest of President Michael D. Higgins. Her debut solo CD release, Caitlín was voted the 2012 'CD of the Year' award by tradconnect.com as well as being labelled the 'top Irish traditional album of 2012' by The Wall Street Journal.

Tógadh Éanna Ó Cróinín i gceartlár na Gaeltachta, i Ráth Chairn, co. na Mí. D’fhás sé aníos le cultúr gaelach, sheimhir na háite siúd, i measc amhránaithe agus damhsóirí seannóis, scéalaithe agus ceoltóirí na Gaeltachta. Thosnaigh sé ag foghlaim an cheol ar an fheadóg stáin ag aois an-óg, agus thóg sé dúshlán an phíb uillinn ar fhéin ag aois deich mbliana. D’fhoghlaim sé ceird an phíb i gclub na bpíobairí uillinn, NPU, i mBaile Átha Cliath, faoi choimirce Nollaig Mac Cárthaigh, Mic O’Brien, Seán óg Potts, Robbie Hannon agus go leor eile.

Is iomaí ceolchoirm agus camchuairt atá curtha dó aige ó shin, ar fud na hÉireann, sa Bhreatain agus san Eorap. D’eisigh sé a chéad albam aonair sa bhliain 2012 dár teideal Ceol Ársa na bPíob.
Tá comórtais go leor buaite aige mar phíobaire, idir fleadh cheoil na hÉireann, Oireachtas na Gaeilge agus bonn óir Sheáin Uí Riada.