Westlife might be denied their 14th UK number one by an unlikely challenger - an anti-bullying song about a JCB.
Nizlopi's JCB Song, about a young boy wishing his dad's digger could demolish school bullies, is apparently outselling Westlife's latest tune.
But music store HMV predicted When You Tell Me That You Love Me might do better later in the week.
Nizlopi are now second favourite to get the Christmas number one, behind whoever wins TV talent show X-Factor.
The band are Luke Concannon and John Parker, a duo from Warwickshire.
They're pretty much unknown, which experts say might be the reason they're outselling Westlife.
Because When You Tell Me That You Love Me is already out on Westlife's album Face to Face, many people will already own the song, and won't want to buy it again in the shops.