Using at least one metric, the Spotify Viral 50 chart, quite an impact indeed. Babymetal performed at the massive Sonisphere festival in Knebworth, then followed that with a headline performance at The Forum in London two days later. So naturally you’d expect that the girls experienced an uptick in Spotify plays, which is exactly the case.
The “Viral 50″ chart, unlike the “Spotify 50″ — which simply ranks by number of plays — attempts to establish a metric of virality by dividing a song’s streams by the amount of times that song has been shared by users in the last week, producing a ratio, the higher the better. “Gimme Chocolate” and “Megitsune” landed at #8 and #12 on the UK chart this week, the former of which actually jumped down a notch from the week prior (it’s already been two+ weeks since Sonisphere, after all).