Would it be ok to compliment this girl on her new piercing?

she is close friends with this other girl I know from the bar , there both in mid 20's are attractive young women. she was at the bar last night and other girl not with her , she was wearing this small top and showing off a new belly piercing , I know she definity didn't have one last summer as I remember seeing her non-pierced belly button. she like stood rate beside me. the weird thing about this as I had been trying to convince her friend to get this piercing for a while as I though it really suit her but she wouldn't go for it now the other friend does instead. anyways feel awkward saying anything about it but it did look really good on her she had the body for it
Would it be ok to compliment this girl on her new piercing?
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