She was planning to make her debut at the Deutsche Oper in Berlin in mid-December 2006, but due to the last-minute indisposition of soprano Angela Gheorghiu, Cabell was asked to step in, and her debut took place somewhat earlier - on 7 December - as Juliette in Gounod's "Roméo et Juliette" alongside Neil Shicoff. She had previously sung the role at the Spoleto Festival USA in May 2006. Cabell made her debut with the Metropolitan Opera on December 22, 2008, singing the role of Pamina in "The Magic Flute."