Henry Burr was a Canadian singer, radio performer and producer. He was born Harry Haley McClaskey and used Henry Burr as one of his many pseudonyms, in addition to Irving Gillette, Henry Gillette, Alfred Alexander, Robert Rice, Carl Ely, Harry Barr, Frank Knapp, Al King, and Shamus McClaskey. He produced more than 12,000 recordings, by his own estimate, and some of his most popular recordings included "Just a Baby's Prayer at Twilight", "Till We Meet Again" with Albert Campbell, "Beautiful Ohio", "I Wonder Who's Kissing Her Now" "When I Lost You" and "In The Shade Of The Old Apple Tree". A tenor, he performed as a soloist and in duets, trios and quartets.

Albert Charles Campbell was an American popular music singer who recorded between the late 1890s and the 1920s. He was best known for his many duo recordings with Henry Burr, and as a member of the Peerless Quartet and other vocal groups, but also recorded successfully as a solo singer both under his own name and under various pseudonyms including Frank Howard.