Since debuting in January, Apple’s new Stroll spot has paid dividends for Philadelphian duo Marian Hill, whose song Down soundtracks an ad that features dancer Lil Buck contorting himself across a black and white cityscape.

The song’s video has now racked up 12 million views on YouTube, (somewhat ironically) reached Spotify’s global viral Top 20 and hit No.1 on the Shazam chart in America and Canada and No.5 worldwide.

The track has sold 27,104 copies in the UK to date, ...