Lonely This Christmas
Originally formed in 1966, the quartet known as Mud had an easy, laid-back pop style. They first hit it big in 1973 in the UK with Crazy and Hypnosis.
"Their uncomplicated blend of pop and rockabilly brought them an impressive run of 12 more Top 20 hits during the next three years, including three UK number 1 hits: Tiger Feet and Lonely This Christmas (both 1974), and Oh Boy (1975)."
(Encyclopedia of Popular Music)