you and jason used to date until he cheated on you and you found out, you were heartbroken and havent spoke to him since. Now your performing in front of a huge crowd and without your knowledge, Jason was there with his new girlfriend at the back of the crowd as she was a fan of your work.

The song you were singing was aimed at yours and his past, hitting Jason hard and causing him to feel guilty, his girlfriend didnt know about yours and his old relationship.