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Beyoncé, dressed in fringed white cow-wrangler garb, did a bit of her song “Freedom” before segueing into “Ya Ya,” during which her 13-year-old daughter Blue Ivy was among her large crew of dancers.

“Ya Ya” ended with the singer sitting in a throne as a giant robot arm poured her a drink.

Known for hits like Ms Jackson, Rosa Parks and Hey Ya!, their swampy Southern rhythms and bohemian take on hip-hop changed the sound of the genre in the late 1990s and early 2000s.

Researchers studied 40 bonobos at the Lola ya Bonobo sanctuary in the Democratic Republic of Congo, and 50 chimpanzees at the Chimfunshi Wildlife Orphanage in Zambia.

Leaning in for a hug, he adds, "Don't be sad, be happy. I love ya."