Until he started his band, Armstrong mainly sang at his local parish church services or at weddings, away from the public eye. Armstrong impersonated Susan Boyle's "Britain's Got Talent" rendition of "I Dreamed a Dream" in the show "Your Face Sounds Familiar" and surprised the judges by singing in falsetto. He sang "Winter Wonderland" during the celebrities Christmas special of "Pointless" and "No Rhyme for Richard" from "Blondel" in BBC Two's "Tim Rice: A Life in Song" and collaborated with The Sixteen to record the single "Good King Wenceslas" to raise funds for the charity Crisis.