Sam was fiddling with the radio, the songs flitting from the barely passable to the brilliant.
'What are you even looking for?' Dean asked, flicking Sam's hands away from where they were hovering over the radio, trying to find the station he wanted.
'Something a little more.. well, festive.'
'I'm not really a fan of the whole christmas thing, you know,' Dean turned and glared at Sam, almost swerving as the Impala skidded on the icy roads. Snow was falling around them, covering the landscape in a fluffy, pure white, blanket that covered the pine trees lining the road until they looked like decorations on a cake that had been sprinkled with icing sugar.
Sam stopped and smirked at Dean, who was completely engrossed in ensuring they got back to the motel safely. Out of nowhere the radio perked back to life and started blaring;
'I wish it could be Christmas everyday, when the kids start singing and the band begins to play,'
Sam started singing along, all too full of Christmas spirit for Dean's taste, tunelessly crooning along like a hopeful X Factor contestant. Dean started slamming at the radio, trying to stop the painfully loud classic Christmas music, but to no avail. Somehow, Sam had managed to stick the radio on the one particular station that had a predilection of playing 70's themed Christmas tunes.
'I really recommend you turning that off Sammy-' Dean's tirade was cut short by Sam turning the radio up to such a point where the windows almost started to vibrate and all you could make out were his silent arguments- well only if you could lip read.
-

'They must really like Wizard; look at that one young man, waving his arms about and singing like he's got no care in the world,' a passing motorist remarked to her partner- 'it's so lovely to see people enjoying the Christmas spirit.' They drove alongside them and rolled their window down, letting only the tiniest amount of snow anoint the perfectly manicured hair of the driver.
'Merry Christmas you two!' She shouted, smiling and singing along through the window to Sam, the music so loud it was almost as if it were playing in their own car.

-
Sam was laughing to such an extent that his breathing started to turn erratic and he was barely able to continue singing, although he did turn the music down a notch.
'See, everyone likes a little bit of Christmas cheer; I bet you just made her day,'
'I'm still not singing Sam.'
'Come on, you know you want to,' each encouragement was punctuated with jabs at Dean's upper arm, the constant pestering an attempt to break Dean's icy demeanour. Eventually, although the song was almost finished, a tiny smirk broke through and decorated one side of Dean's face, his demeanour cracking under the tirade of Sam's Christmas cheer.
'SO LET THE BELLS, RING OUT FOR CHRISTMAS,' Dean belted out, his face breaking into a grin as the song drew to an end and his Christmas season started.