Armin van Buuren releases ‘Christmas Days’ as holiday themed spinoff of “Sunny Days” Armin van Buuren puts a holiday spin on hit song 'Sunny Days.' Related Posts: Alesso and Armin van Buuren unite two storied timelines on ‘Leave A Little Love’ Must-stream: Xavi’s remix of Seven Lions, Last Heroes, and HALIENE’s ‘Don’t Wanna Fall’