Naughty Boy brought along Sam Smith to US TV programme, the Late Show With David Letterman last night (25th April), to perform a live rendition of 2013 hit La La La.

Receiving a rousing applause at the end, the performance caps off a stellar twelve months for both Naughty Boy and Smith as they spearhead into the big-league of major artists as both collaborators and in their entities.

Watch the full performance below: