Justin Bieber dedicates a song to Kendall Jenner at her 30th birthday party?

Justin Bieber made Kendall's birthday bash unforgettable by performing a surprise mini-concert.

The supermodel celebrated her milestone 30th birthday in style with a glamorous beachside bash.

A new vlog shared by Kylie Jenner’s best friend, Anastasia Stassie Karanikolaou, revealed the 31-year-old Canadian pop superstar serendaing the birthday girl with his latest track, Devotion from his album Swag.

In the footage, Bieber addresses guests, saying, "This song is dedicated to Kendall tonight. Happy Birthday!" prompting cheers as Kendall sang along, wrapping an arm around her best friend and Justin’s wife, Hailey Bieber.

The Peaches singer later joined the girls for karaoke, including hits like No Pressure and his 2015 single What Do You Mean.

Kylie also surprised her sister by performing her single Fourth Strike, with Kendall eagerly recording the performance on her phone.

Hailey joined in, adding to the lively, intimate celebration of family and friendship.

Photos shared on Instagram by Kim Kardashian's Instagram account showcased the lavish gathering, featuring theme beach outfits for the Kardashian clan, a spectacular fireworks display, a white birthday cake accented with black ribbons, and vintage Château Haut-Brion wine from the year Kendall was born.

The SKIMS founder post read: “Happy 30th Birthday @kendalljenner. Here’s to 30, Kenny.”

Hailey added on Instagram Stories: “I love you, my sweet, beautiful best friend! We really doing this life s*** forever.”

The star-studded celebration combined music, laughter, and luxury, making Kendall’s 30th birthday one for the record books.