I do. I sing my own melodies and songs, complete with partial or whole lyrics. I even wake up often with music in my head, words and all. I'm always full of melody and music and I love to sing, but I am also quite shy about it.
Driving around in your car singing along to the radio, to me is the best medicine when you have a bad day. Mark Nepo writes on page March 27 in THE BOOK OF AWAKENING that singing helps us cope, stemming from the crying (singing) at birth.