Imagine, both of them sitting round the fire in Christmas jumpers, pulling crackers and fighting over the remote...
The Rap God (his words) is the latest celebrity to extend a hand to the troubled 19-year-old (apparently Oprah and Tom Hanks have also tried to "save" him) and he hopes spending time with him in Detroit, Michigan could help him to get his life back on track. You'd think spending time in America's bankrupt state would give the Biebs a bit of perspective.
A source told The Sun: "He's really hoping he can sort Justin out. The way he's going, he's worried he's going to end up in really bad trouble. He wants to talk him into going to therapy and counselling to deal with the stress of fame in a positive way. Everyone is saying how they think he's a ticking timebomb."
Justin has had an eventful year which has seen him criticised for spraying graffiti in Brazil and getting into trouble for swearing at customs officers in Australia.
He also tried to sneak out of a Brazilian brothel under a white sheet and was accused of calling a young fan a "beached whale".
Marshall Matthers III is hoping a heart-to-heart will help Justin and he would like to work with the 'Boyfriend' hitmaker once he cleans up his act: "Eminem would consider going in the studio with him if he sorts himself out, which would be a dream come true for Justin."
The 41-year-old has been frank about his past problems, including a rather large battle with prescription drugs; he was swallowing up to 60 Valium and 30 Vicodin pills a day which saw him nearly die of an overdose.