A floral tribute and a teddy bear alongside police tape near to the Manchester Arena, following a deadly terror attack at the Ariana Grande concert. Pic/ AFP

London: Entertainment and sports celebrities took to social media to express sadness and shock in the aftermath of the bomb attack in Manchester that killed at least 22 people. The attack occurred on Monday evening in the foyer of the city's Arena stadium, where U.S. singer Ariana Grande had just finished performing a concert.