Child's service

Today is my friends daughter service the baby was only 9 years old some guy killed her I am still unaware of what really happened to the baby. But I wasn't sure if I wanted to attend to the service because it's a very sad and emotional situation I don't want to see my friend in pain but I know I have go be there for her. I just got off work and I am 1 hour away I will not have time to change will it be okay to wear Jean's or is it disrespectful? Also do I buy Rose's what color. This is so sad I never been to a service before I am not sure what to expect or say please ladies help me

I'm am so sorry friend