Kourtney Kardashian joins the family choir to celebrate Travis Barkers

Kourtney Kardashian joins the family choir to celebrate Travis Barker’s daughter Atiana on her birthday

Kourtney Kardashian joins family choir to celebrate Travis Barker’s daughter Atiana on her 23rd birthday: “Cutest in the land!”

Kourtney Kardashian has formed intense bonds with each of Travis Barker’s children since the couple began dating more than a year ago and got engaged in October.

The Poosh blogger, 42, sent birthday wishes to his eldest stepdaughter Atiana De La Hoya on her 23rd birthday on Tuesday, with a couple of sweet snaps shared to Instagram.

Kourtney and Atiana – whose mother is Shanna Moakler and father Oscar De La Hoya, and who also grew up loving Barker – looked ready to hit the runway in a couple of throwbacks posted to their 166 million followers.

Birthday girl: The Poosh blogger, 42, sent birthday wishes to his eldest stepdaughter Atiana De La Hoya on her 23rd birthday on Tuesday, with a couple of sweet snaps shared to Instagram

Birthday girl: The Poosh blogger, 42, sent birthday wishes to his eldest stepdaughter Atiana De La Hoya on her 23rd birthday on Tuesday, with a couple of sweet snaps shared to Instagram

Kourtney and Atiana looked ready to ride as they buttoned up matching jackets and donned helmets in one picture.

The gorgeous redhead basked in the sunlight while waiting to go snowboarding with her family, as Kourt admitted the eldest of the kids was “the cutest in the land”.

Travis and Kourtney’s union brings together a total of six children. She has three children with her ex Scott Disick – Mason, Penelope and Reign – while he has Alabama, Landon from his previous marriage to Shanna Moakler, which ended in 2008.

Good times: Kourtney and Atiana - whose mother is Shanna Moakler and father is Oscar De La Hoya and also grew up loving with Barker - looked ready to hit the runway in a couple of throwbacks posted to their 166 million followers

Good times: Kourtney and Atiana – whose mother is Shanna Moakler and father is Oscar De La Hoya and also grew up loving with Barker – looked ready to hit the runway in a couple of throwbacks posted to their 166 million followers

Proud dad: Atiana's biological father, Oscar De La Hoya, shared a beautiful photo of his daughter and wrote: Happy birthday to my beautiful daughter.  I love you!  I'm so proud of you and I always believe in you!'

Proud dad: Atiana’s biological father, Oscar De La Hoya, shared a beautiful photo of his daughter and wrote: Happy birthday to my beautiful daughter. I love you! I’m so proud of you and I always believe in you!’

What a time: Shanna wrote that she was Atiana's age when she was pregnant with her firstborn

What a time: Shanna wrote that she was Atiana’s age when she was pregnant with her firstborn

Atiana’s biological father, Oscar, shared a beautiful photo of his daughter and wrote: Happy Birthday to my beautiful daughter. I love you! I’m so proud of you and I always believe in you!’

Noting that she was Atiana’s age when she was pregnant with her firstborn, Shanna posted some stunning shots of her daughter to accompany a throwback to her childhood.

“My gift from God. No words will ever describe how proud you are of your beautiful soul,” she wrote. No matter time or space, I love you more than life. Have a nice day, I love you.’

The youngest daughter of Alabama, Travis and Shanna, who just turned 16 in December, posted a beautiful black and white snap and wrote, “Happy birthday to my sweet sister I love you.”

Previous: Shanna posted a carousel of pictures with her daughter, including a throwback from her childhood

Previous: Shanna posted a carousel of pictures with her daughter, including a throwback from her childhood

Family forever: The youngest daughter of Alabama, Travis and Shanna, who just turned 16 in December, posted a beautiful black and white snap and wrote,

Family forever: The youngest daughter of Alabama, Travis and Shanna, who just turned 16 in December, posted a beautiful black and white snap and wrote, “Happy birthday to my sweet sister, love you.”

Kravis Alert: Travis and Kourtney made their Oscar debuts Sunday night at the 94th Academy Awards at the Dolby Theater before he performed as part of the house band on drums

Kravis Alert: Travis and Kourtney made their Oscar debuts Sunday night at the 94th Academy Awards at the Dolby Theater before he performed as part of the house band on drums

Travis and Kourtney made their Oscar debut at the 94th Academy Awards at the Dolby Theater on Sunday night before he performed as part of the house band on drums.

Although many of the Kardashian-Jenners have attended after parties over the years, Kourtney is the first to ever walk the red carpet and attend the actual Academy Awards.

In usual Kravis fashion, the pair could hardly keep their hands off each other and packed up the PDA while she showed off a strapless vintage Thierry Mugler midi dress with a knee-high slit.

Matching his fiancee, he wore an all-black ensemble with his signature Prada sunglasses, patent leather shoes and a diamond brooch.

The Blink 182 drummer was part of an all-star band that included Sheila E, pianist Robert Glasper and musical director Adam Blackstone.

Lucky in love: In usual Kravis fashion, the couple could hardly keep their hands off each other and packed up the PDA while showing off a strapless vintage Thierry Mugler midi dress with a knee-high slit

Lucky in love: In usual Kravis fashion, the couple could hardly keep their hands off each other and packed up the PDA while showing off a strapless vintage Thierry Mugler midi dress with a knee-high slit