The 'Shake It Off' hitmaker paid a touching tribute to four-week-old Leo Thames -during her concert at Santa Carla's Levi's Stadium in California on Saturday as she dedicated a song to the little boy.

Speaking before performing 'Never Grow Up', she told the sold-out crowd: "I wrote it when I was like 18 or 19 but my friend just had a baby and she made me godmother of it and I was holding this little baby the other night and I was just thinking differently.