Birthday Gift Olive Young Gift Certificate vs. Espoir

I'm debating whether to give an Olive Young gift certificate or an Espoir gift..

Is it okay for everyone to receive cosmetics as a birthday gift?

I’m hesitant as the giver, but I really like it myself; I’m not sure how the recipient will feel.

I'm worried that if I just pick whatever I want, they might not like it.

Would a gift certificate be okay? I'm worried it might look like I haven't put much effort into it!!!

She is a friend who is very interested in cosmetics! Haha.