No One Comes Between Kendall Jenner & Justin Bieber's Calvins!

Kendall Jenner and Justin Bieber are the perfect ambassadors of Calvin Klein underwear! The stars and alleged lovebirds stepped out together at a fashion event of CK in Hong Kong, and they looked nothing but picture perfect.

While Kendall flaunted her beautifully toned supermodel figure in a grey and black short dress, Justin was a show stealer with that ab show! Yes, Justin showed his CK undie and not to forget, the built abs when he lifted his white t-shirt up on the grey carpet.

Courtesy of Twitter

Justin who is also the face of Calvin Klein underwear also reportedly performed on his hit songs like "Boyfriend" and "Beauty and a Beat."

Courtesy of Twitter

Scooter Braun, Bieber's manager, took to Twitter to give details on the party. "Yeah @justinbieber is killin it at the #calvinkleinlive event in Hong Kong. Out of no where he took a request and is playing #onetime!" he wrote.

Kendall and Justin Bieber had a blast at the grey carpet of Calvin Klein event where they even did cartwheels. Kendall shared a pic doing cartwheels on the carpet with Bieber on her Instagram account.

Courtesy of Instagram

The Keeping Up With The Kardashians star also uploaded a sexy selfie showing her toned abs and CK undies on Instagram. Showing her black and grey CK garment and a black bikini bra, Kendall shared a selfie with the caption, "Hong Kong with @calvinklein #MyCalvins."