The band's 45-year-old drummer was spotted holding hands with his famous Keeping Up With The Kardashians girlfriend on Tuesday at celebrity hotspot Nobu in Malibu.
Despite having his beautiful lady on his arm, Barker appeared somber as the couple made their way past photographers.
Wearing a white tank top to show off his tattoos, the musician slipped on a beanie and black jeans for their nighttime outing.
Showing no emotion at all, Barker stared past shutterbugs as the two made their way into the beachfront restaurant.
Earlier this week, Hoppus bravely revealed he is battling cancer.
The 49-year-old Blink-182 bassist took to his social media and told the world, "For the past three months, I've been undergoing chemotherapy for cancer."
Admitting "it sucks and I'm scared," Hoppus said he's not giving up. "I’m blessed with incredible doctors and family and friends to get me through this," he added.
Revealing he still has "months of treatment ahead of me," the star continued by stating he's "trying to remain hopeful and positive."
Ending his statement, Hoppus wrote, “Can’t wait to be cancer-free and see you all at a concert in the near future. Love to you all."
The musician also shared a photo of himself hooked up to an IV at a medical facility and joked, “Yes hello. One cancer treatment please.”
Following his announcement, Hoppus' Blink-182 bandmates offered their words of support.
“Mark is my brother,” Barker told E! News. “I will be with him every step of the way on stage and off and can’t wait for us to play together again soon.”
The band's singer Tom DeLonge addressed Hoppus' diagnosis on Twitter.
"I too, have been aware of @markhoppus’s cancer diagnosis for awhile now. And to add to his own words that he used today, I would also like to say that he is strong, and a super-human who is pushing through this difficult obstacle with a wide-open heart," he wrote, adding, #WeHaveHisBack."