The group has supported various charitable causes. They were involved in the "Helping For Haiti" charity single that was released in February 2010 in the UK, as well as releasing a cover version of "Uptown Girl" for Comic Relief, one of their biggest selling singles to date.
They have participated in a Royal British Legion poppy appeal and did an advertisement for Galway's Irish Water Safety campaign. They also lent their support to the Irish Blood Transfusion Service (IBTS). On 4 November 2005, they performed with other music artists at Coca-Cola Dome in Johannesburg, South Africa for The "Unite of the Stars" Gala Banquet charity concert that supports four charities: the Nelson Mandela Children's Fund, Unite Against Hunger, St. Mary's Hospital and the Topsy Foundation. They also performed live for charity on Sports Relief, Macmillan Cancer Support, Croí, Western Alzheimer's, O’Dwyer Cheshire Home, Mayo Cancer Support Group, Marie Keating Foundation, Outward Bound Trust, ChildLine, Children in Need, Sheffield's Children Hospital. They had also helped for auctions on Meningitis Research Foundation, Carlton Celebrity Auction (for Centrepoint (for the homeless), the N.S.P.C.C., and The Samaritans), Zutto charity painting, Pushing The Envelope (for National Literacy Trust). They've visited also Great Ormond Street Hospital. They've been involved also with the following organizations: Royal National Institute for the Deaf (RNID), Cancer Research UK, United Nations' World Food Programme (WFP), Muscle Help Foundation, Global Breast Cancer Awareness Campaign and Real Man campaign. They are also included as ambassadors of The Irish Society for the Prevention of Cruelty to Children (ISPCC). As part of IPSCC, Feehily signed up for their anti-bullying campaign, "Join the Fight for Children's Rights". and Aware, Byrne for Heart Attack and asthma awareness campaigns, Daily Star's Reclaim Our Streets crusade, Byrne for Oxfam's East Africa famine appeal (by Celtic v Manchester United football match), and for Children's Hospice South West (by Truro charity football match). Filan, Byrne for Soccer Aid, JP McManus Invitational Pro-Am, One World Beat. Filan for Irish Red Cross (by Sligo Rover's Showgrounds football match), and Egan for Strandhill Indonesian Relief Fund (SIRF, in aid of the South Asian tsunami victims).