Dick Van Dyke Celebrates Turning 90 With Chimney Sweep Flash Mob Dance

Now this is Supercalifragilisticexpialidocious! Legendary actor Dick Van Dyke celebrated his 90th birthday in style.

The beloved Hollywood legend wowed a crowd at The Grove Shopping Center in LA when he took part in a singalong while a flash mob danced along to 'Step in Time', 'Jolly Holiday', 'Chim Chim Cher-ee' and 'Supercalifragilisticexpialidocious'.

Dick, and his wife Arlene Silver-Van Dyke, later described the performance as "unbelievable".

Happy birthday Dick!