Girlfriend constantly liking one guys photos, should I worry?

Wondering if I should worry or not, my girlfriend keeps liking a guys photos who is a drummer. She knew the guy from uni in the past they were friends but its been years. He is meant to be playing nearby in a week's time. But she has no joke compared to every other person she follows liked every single one of his pictures from him drumming topless, to licking his drum stick to making sexual comment videos to making videos of him pretending to thrusting his hips sexually. We had a talk in the past and she didn't want to me to follow models or people who post such things but says its different and fine as its someone she knew and she is just supporting his music/talent. I feel weird about it and wondered if I am overreacting or should worry at all?
Girlfriend constantly liking one guys photos, should I worry?
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