Singer-songwriter Callaghan left London in 2010 to record her debut album with singer-songwriter Shawn Mullins — a collaboration that began with a MySpace message. Since her move to the States, Callaghan has been touring heavily in support of that album, titled Life in Full Colour. Her style combines folk, pop and country influences to create songs that are as hooky as they are satisfying. Asheville audiences may recall hearing Callaghan’s sweetly sung tunes when she appeared as an opener at The Altamont and, more recently, in co-bills. She headlined her own show at the Altamont Friday, March 7.