This is the main song from the 2003 star-studded rom-com "Love Actually," starring Liam Neeson, Emma Thompson, Kiera Knightly, Hugh Grant, Claudia Schiffer, Shannon Elizabeth, Denise Richards, and a then-unknown January Jones.

You know the song's performer as "Billy Mack," (played by Bill Nighy), and it's an alternate version of the real-life Wet, Wet, Wet song "Love is All Around." In the film, Billy tweaks "his" song "Love is All Around" as a cheap ploy for a number one single at Christmas.