After footage emerged of Rihanna twerking - an energetic dance move made popular by Nicki Minaj which involves a person shaking, wobbling and bouncing their hips and butt up and down - to a song by her ex Drake, Karrueche shared her distaste.
A friend of the model - who is currently dating Rihanna's ex and Drake's rival for Rihanna's affections, Chris Brown - told HollywoodLife: ''Karrueche doesn't really talk about Rihanna but she has seen her Twerk video and couldn't believe it,. From her perspective, it wasn't tasteful at all. There was just no reason for all that. I don't know. That girl is free to do whatever she wants but it makes her look bad and thirsty doing stuff like that.''
Meanwhile, Chris is also said to be unimpressed with the saucy video.
The insider added: ''Yeah, he saw it. All he did was laugh at it, say, 'wow,' and shake his head. He loves her and has respect for her that's out of this world, but clearly she's desperate for attention.''
The actress thinks it would be tough to recast her character, Winifred Sanderson.
Beck wishes he'd had ''more fun'' when Kanye West invaded the stage in protest at his 2015 Grammy Awards win.
The Duffer Brothers wanted to "experiment a little bit".