Usher, second from right, and US actor Anthony Anderson, left, enjoy an impromptu singalong accompanied by friends at Hilton Abu Dhabi Yas Island. Photo: Instagram / Anthony Anderson
Usher, second from right, and US actor Anthony Anderson, left, enjoy an impromptu singalong accompanied by friends at Hilton Abu Dhabi Yas Island. Photo: Instagram / Anthony Anderson

Usher performs impromptu 6am piano concert in Abu Dhabi hotel lobby