Songfacts®:

• McEntire explained to Great American Country: "It's a song about a woman who found out that her husband left on Saturday for a woman who is half her age. She spent the day lying in bed, but then on Monday got up, loaded up her pickup truck and began a new chapter of her life. She went on with her life and didn't look back."
• This is the only track on Keep on Loving You that McEntire has a songwriting credit for. She told Great American Country: "I wrote the first two lines of 'She's Turning 50 Today' and sent it to Liz Hengber. I said, 'Why don't you work on this a little bit and email me back what you've got?' Two years went by, and I said, 'Liz, what about that song?' She said, 'Tommy Lee James and I are going to work on it. So by the time this album came around to start recording, they sent me an MP3 of it while I was in the studio. I rewrote the second verse to make it more personal and relate to me when I left Stringtown, Oklahoma, in 1987. So in a way it's about me leaving a relationship, but it was certainly years ago, but put the two together."