Kourtney Kardashian, too, has been enjoying celebrating her stepson's big day, sharing shots of a lavish "Happy Birthday Landon" balloon arch as well ... celebrated his 21st on Wednesday, October ...

On Wednesday, Oct. 9, Travis Barker posted a heartfelt Instagram tribute to his eldest son for his 21st birthday. The 48-year-old drummer posted a carousel with several photos of the "Friends with ...

Travis Barker posted a sweet tribute for his son Landon Barker’s 21st birthday Wednesday ... star later posted a photo of silver and gold balloon arches featuring Landon’s name and age.

There was a very special celebration in the Kardashian-Barker household on Wednesday as Kourtney Kardashian and Travis Barker marked his son Landon's 21st ... balloon arch that read: "Happy ...