The song "AM to PM" by Christina Milian is all about partying and having a good time from morning until night. The lyrics talk about how everyone wants to dance and have fun when the beat drops. Whether it's day or night, people are always ready to turn up and keep the party going. The song describes a lively atmosphere where everyone is dancing and enjoying themselves, with people looking like stars and bumping the music in their cars. It's a celebration of life and letting loose, with the suggestion to keep the rhythm going and just enjoy the moment. Overall, the song captures the energy and excitement of a fun night out where the good times never stop, from early in the morning to late at night.