I guess she likes a more muscular body. She have been posting a lot of her workouts lately, using a lot of ankle weights and dumbbells, so maybe she wants to bulk?My question is, why would you want to bulk up on the arms at all? Her shoulders are huge and make her body look more square than it needs to be.
In my opinion, she was on her peak around 2009/2010, I prefer when she's skinnier and I'm not a fan of big muscles
Her arms actually aren't what bothers me the most in those photos, although I think she's always had broader shoulders and the more muscular arms aren't flattering on her at all. For me, it's that little pocket of fat hanging off the side of her face over where her chin is that gets me (mostly because my face looks like that if I gain weight, lol). It just makes her look very bloated, imo.
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I didn't notice until reading your comment. I'm pretty sure she gained weight recently, but she has been doing a lot of filters and maybe she over did and turns out weird. Wouldn't be the first model...