"A quarantine birthday," wrote Kendall on Instagram, alongside a series of videos of about a dozen cars lined up outside of Kourtney's house honking and wishing her a happy birthday. Keeping things

"A quarantine birthday," wrote Kendall on Instagram, alongside a series of videos of about a dozen cars lined up outside of Kourtney's house honking and wishing her a happy birthday. Keeping things festive, the group of celebrators held up balloons and homemade birthday signs as they played Rihanna's "Birthday Cake" and Blackpink's "Birthday B-tch."

"Car parade for @kourtneykardash birthday," Khloe wrote on her Instagram Story, giving fans a closer look at the epic festivities with videos. "This was amazing, everybody loves celebrating [you]."

Making sure Kourtney felt the love, Khloe shared a heartwarming post to wish her older sister a happy birthday. "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," adding, "Today and every day, I pray that your soul is covered in love and from your core, I pray that you're happy! You deserve only magical things! In all of the lifetimes before and in all of the lifetimes after, I will love you!"