This year's 5 best celebrity April Fools pranks, from Chris Pratt to Aubrey Plaza

Plenty of entertainment luminaries participated in the tradition over the weekend, including Chris Pratt, Aubrey Plaza and Sarah Polley. Photos: AP, AP, AFP

Plenty of entertainment luminaries participated in the tradition over the weekend, playing mischievous tricks on their fans and each other.

Among the Hollywood figures who observed the humorous holiday this year were Usher, Martha Stewart, George Takei, Aubrey Plaza, Heidi Klum, Chris Pratt, Michael Che, Rick Astley and Sarah Polley.