Bringing a gift to a quinceñera?

ThatonegirlwholikesBTS • I am the most laziest little shit

My best friend was invited to a quince by a girl who I know as well. Me and her know each other like my best friend knows her and we are all in a club together. She doesn't invite me at all and i want to go with my best friend to that quince because she doesn't know anyone who is going. And me and her are bickering over if I should give a gift to her even though I wasn't invited. I think i shouldn't because I was INVITED meaning SHE DIDNT THINK OF ME SO WHY SHOULD I THINK OF HER. And yeah I know about the food there how I'm gonna eat but still:/ it kind of bothers me that my best friend still thinks i should bring a gift even though i wasn't still damn invited. I am just going because I feel bad for my best friend that she doesn't have anyone to go with. Should I bring a gift or not ?