Chevalier Theatre welcomes back British pop singer Engelbert Humperdinck for his fourth Medford appearance, with this show titled “A Winter World of Love, A Night of Holiday Classics & Greatest Hits.” In a career spanning almost 50 years, Humperdinck has generated sales in excess of 140 million records, including 64 gold albums and 23 platinum, four Grammy nominations, a Golden Globe, and stars on the Hollywood Walk of Fame and Las Vegas Walk of Fame. Tickets are $43 to $89 through the Chevalier Theatre website/Ticketmaster. To avoid online ordering fees, purchase tickets at the Chevalier Theatre Box Office, which is open on Fridays and Saturdays from noon to 6 p.m., as well as two hours before every Chevalier Theatre show.