Patricia O'Callaghan

O’Callaghan's first recording, Youkali, was released in 1997 and features cabaret songs by Kurt Weill, Erik Satie and Francis Poulenc. She followed it with Slow Fox (1999), which contains "Hallelujah", the first of her many interpretations of Leonard Cohen's songs. That year she performed in Toronto at Ted's Wrecking Yard, to an audience more accustomed to high energy rock music. It was asked, later, why she did not perform songs by Stan Rogers and Gordon Lightfoot.

O’Callaghan released Real Emotional Girl (2001) and Naked Beauty (2004). But it was 2011–12 before her recording career appeared to hit its full stride. That year O’Callaghan sang on Broken Hearts & Madmen with the Canadian chamber music ensemble the Gryphon Trio and released Matador: The Songs of Leonard Cohen, which one critic pointed out was in several respects a better work than the 1987 Cohen tribute album Famous Blue Raincoat recorded by Jennifer Warnes. Another, Jon O’Brien, wrote in a review for the AllMusic website: “A graceful and respectful homage to a true musical icon, Matador: The Songs of Leonard Cohen cements O’Callaghan’s position as one of his most accomplished interpreters.” O’Callaghan was an artist in residence with Soulpepper Theatre Company in the Distillery District of Toronto for six years where she worked "towards her heart's ambition to bring her distinctive brand of cabaret to a broad-based audience".

O'Callaghan was featured as a singing character in the 1999 CBC Television series Foolish Heart and in the 2004 Canadian TV movie Youkali Hotel produced by Enigmatico Films and WestWind Pictures.

The singer is perhaps best known for her cover version of Cohen's "Hallelujah", recorded in 1999 and reissued in 2001 and 2012, and her many live performances of the song.

Patricia Mary O'Callaghan (born 2 October 1970) is a classically trained Canadian singer. She is a soprano who has built an international reputation as a performer of contemporary opera, early 20th-century cabaret music and the songs of Leonard Cohen.