Tristan Thompson drove ex Khloe Kardashian to the soiree as she called out with a megaphone from the roof of the car.
"Happy birthday my beautiful @kourtneykardash!!! In any lifetime I would have found a way to have you in my life forever! I can’t imagine my life without you, nor would I ever want to imagine that," Khloe wrote in a touching Instagram post. "You and I have an incredible rare bond that no matter what, it can never be broken. (Yep! You’re stuck with me!) You are my best friend, one of the rare few I can count on most in my life."
For more from the Kardashians, watch the clip below: