Billy Joel celebrated his daughter Della Rose's 9th birthday with heartfelt social media posts, sharing rare photos that highlighted her love for animals and her resemblance to her famous father. In his Instagram and Facebook tributes, Joel expressed his admiration for Della, stating, "Watching you grow and shine, keeps us all in awe. We love you." Fans flooded the comments, noting how much Della looks like Joel and praising her confidence, especially after her recent performance with him on stage in Cardiff, Wales. Joel, 75, shares Della and her younger sister Remy with his wife Alexis Roderick, whom he married in 2015. This birthday celebration follows Joel's recent conclusion of a decade-long residency at Madison Square Garden. Joel has three daughters in total, reflecting on the joys of fatherhood later in life despite occasional mix-ups with his daughters being mistaken for his grandchildren.