Gigi Hadid spoke to Us Weekly about her mom Yolanda Foster's Lyme disease battle during the First Annual Fashion Los Angeles Awards on Thursday, Jan. 22 Credit: Alo Ceballos/GC Images

Just a phone call away. Gigi Hadid opened up about her mom Yolanda Foster's battle with Lyme disease to Us Weekly during the First Annual Fashion Los Angeles Awards on Thursday, Jan. 22. Though it's been difficult, Hadid and her Aussie singer boyfriend Cody Simpson make an effort to keep in touch with the Real Housewives of Beverly Hills star while balancing their busy schedules.

"We try to call her and FaceTime her with what's going on and keep her feeling like she's not too far away," the Dutch model, 19, told Us at West Hollywood's Sunset Tower Hotel.

"It [lifts her spirits]. I think that she kind of looks forward to it," she continued. "Right now she's going through a lot, so even a little FaceTime once in a while helps."

Foster shocked Bravo viewers earlier this week when she revealed the extent of her condition in a blog post. The RHOBH star had been noticeably absent and behind on her notes since the show's season five premiere in November.

"Although writing is usually my favorite thing to do, I unfortunately have lost the ability to do so in an intelligent matter at this time," the 51-year-old wrote to fans. "Most of you know I have been battling Lyme disease for the past three years."

"I have lost the ability to read, write, or even watch TV, because I can't process information or any stimulation for that matter," Foster continued. "It feels like someone came in and confiscated my brain and tied my hands behind my back to just watch and see life go by without me participating in it."

Hadid, for her part, has been everywhere in recent days. Her modeling career has skyrocketed over the last year, culminating in her being named Model of the Year at the First Annual Fashion Los Angeles Awards Thursday night. She has also been spotted hanging out with pals Taylor Swift and fellow model Kendall Jenner, and is enjoying her rekindled romance with on-again beau Simpson.

"I guess I'll know when the time is right but I don't have a plan," the Calvin Klein Collection-clad star told Us of possible wedding plans with the "Surfboard" singer. "I don't need to get married young and I also don't need to wait, it's just whatever happens."

She added of her success: "It's an honor to even be in this room amongst these amazing people that I'm inspired by every day."