When Trousersnake Timberlake and Jimmy Fallon team up some very funny things tend to happen so, if you're the kind of person who tends to tune in to US comedy staple Saturday Night Live, you'll be delighted to hear that the pair are returning to the show on December 21st, just in time for the holidays. Don't worry, we feel a bit filthy after using that phrase to describe 'The Christmas' ourselves.

Anyway, it seems as though the boys are currently putting their ould thinking caps on as they try to come up with some new ideas for the show. Jimmy took to Twitter to ask 'ole pal JT if he'd had any inspiration yet.

You'd think they'd be hard pushed to come up with ideas at this stage, especially considering the fact that they've already produced some pretty amusing sketches (whether alone or together).

Remember this SNL musical classic that Justin created with Andy Samberg?

Or this magical musical number that came in four parts on Fallon's own show...

How about this beautiful Bee Gees themed offering?

Or this 'Flashback Friday' (work with me here) blast from the past...

Who knows what they'll come up with next, eh?