With such a recent loss, it probably isn't helpful to listen to a playlist of upbeat, perky, fun songs. Additionally, if grieving family members overhear your music choice, they may be confused and offended by your choice. You're grieving and those songs probably do not reflect your true emotions right now. You need time to process how you're feeling instead of burying it. It's possible you may still be in denial.
Some of the sorrow and grief songs may help you connect with the feelings of missing your brother. I hope that you can connect with your family during this time and begin to process his loss. I am sorry about this personal tragedy in your life.