The 'Crazy in Love' singer was there to support husband Jay-Z, who headlined the day with a set that featured appearances from Rihanna and Kanye West.
During the performance of Jay-Z and West's hit track 'Ni**as In Paris', the '99 Problems' rapper asked the crowd to form a circular mosh pit, which Beyoncé then enthusiastically joined.
"Make your family proud," Jay-Z quipped during the song.
Having just wrapped her own string of live concerts after the birth of baby Blue Ivy, Beyoncé has attended several Jay-Z shows over the summer.
Earlier this week she was snapped enjoying a 'Watch the Throne' concert with West's girlfriend Kim Kardashian.
Rihanna closed Hackney Weekend on Sunday night.
Click through the gallery of Radio 1's Hackney Weekend below:
Copyright: WENN
