Robin Thicke rang in his 40th birthday on Friday, and the "Blurred Lines" singer celebrated by remembering his late dad, Alan. Robin posted a selfie of his dad in a car, writing, "Missing the OG today. First Bday without him. Love you Pops." He later followed up with a throwback snap of his dad carrying him as a child, which he captioned, "Thats me! Haha." Alan passed away at age 69 on Dec. 13. The actor — who was best known for his role as Jason Seaver in Growing Pains and, more recently, as Mike on Fuller House — died from a "ruptured aorta" and a "standard type A aortic dissection." He is survived by wife Tanya and his three sons, Robin, Brennan, and Carter.