Cameron went on to share some sweet snaps of himself and his daughter.
In the throwback photo, a young Lo laughs as she rests her head on her dad's shoulder and the other more recent picture shows Cameron and Lo rocking matching poses.
Fans in the comments were quick to send their birthday wishes to Lotus - either that or commend her taste in musicians.
Cameron Daddo shares three children with his wife Alison Brahe: daughters Lotus, 25, and Bodhi, 14, as well as son River, who recently turned 21.
The proud dad shared a similar tribute to River as he reached the milestone birthday; though, his involved no Harry Styles theme.
"Our son growing up before our eyes." Cameron penned on Instagram, sharing a series of throwback snaps of the father and son.
"Twenty-one years, today EarthDay... Happy Birthday @riverdaddo thanks for cooking, the monkey bars, the laughter, the banter, the headaches, puppy love, the art, the smarts and ...one day GOLF????
"I love you my son. 🙌🙌🙌😘 HBD... 21 in 21. 🌹❤️🎯✅ beautiful young man, beautiful mothering @alidaddo xx"
It's clear the Daddo family is as close as anything.