One possibility for Song of the Summer, 2018, their album "The Now Now" released just last week.

From the Gorillaz website:

A sun-drenched new video for first track ‘Humility’ – feat George Benson, starring a roller-skating 2D and a busking Jack Black, was directed by Jamie Hewlett and filmed entirely in Venice Beach, California [in April of this year].

If you know nothing about Gorillaz, this video is a good primer: