As Spider-Man, Aug. 4 -- Brand New Day fever is sweeping fans worldwide, Hollywood's biggest stars are also caught in the web.

Rihanna and A$AP Rocky celebrated their son Riot's birthday by throwing an epic Spider-Man-themed party.

On Saturday, August 1, the couple's youngest son turned three. The Umbrella hitmaker and the Kids Turned out Fine rapper transformed a house, reportedly in Rihanna's home country of Barbados, into a Spider-Man paradise with themed balloons, banners, vibrant red, blue and black decorations. Rihanna's sister-in-law Nadia King, shared an Instagram video, offering fans a glimpse inside the intimate gathering.

The clip featured party's unique "cake bar," where guests could customise slices of cake with their choi...