“Hailey is very close with both Gigi and Bella,” a source tells PEOPLE in this week’s issue, on newsstands Friday. “They have been very helpful in guiding and supporting Justin’s Lyme disease. From their mom’s struggles, they have shared a lot of valuable information. It’s all helped Justin tremendously.”

Bieberaddressed his diagnosisfor the first time on Instagram on Jan. 8, writing, “While a lot of people kept sayingJustin Bieberlooks like s—, on meth, etc. they failed to realize I’ve been recently diagnosed with Lyme disease, not only that but had a serious case of chronic mono which affected my, skin, brain function, energy, and overall health.”

“These things will be explained furtherin a docu-seriesI’m putting on YouTube shortly,” Bieber continued, referencing his upcoming 10-part YouTube Originals docu-series,Justin Bieber: Seasons. “You can learn all that I’ve been battling and OVERCOMING!! It’s been a rough couple years but getting the right treatment that will help treat this so far incurable disease and I will be back and better than ever.”

Hailey Baldwin and Justin Bieber.

justin-hailey-bieber1-e1579029531689.jpg

“For a long time, he was feeling both frustrated and angry,” the source says. “He wasn’t feeling well at all, but no one could help him. And he sought a lot of different medical help before he got the help that he needed. He wants people to know his struggles were real.”

Now that Bieber is getting the right help, the source says he is “looking forward to this year.”

“Justin is doing great now,” the source says. “He is excited about touring and can’t wait to resume his career.”

Throughout 2019, Bieber was often open with his fans about his struggles and treatment for mental health issues, which was the causeof the singer’s own four-year hiatusfrom his solo music career.

Justin Bieber and Hailey Baldwin.ENT/Splash

Canadian Singer Justin Bieber And Hailey Rhode Baldwin Among Friends Hiking In Los Angeles

In February 2019,a source told PEOPLEthat the singer was going through a rough patch, but that he was “receiving some treatment” to get better.

“Justin seems down and tired. He has been struggling a bit,” the Bieber source said.

Ahead of the new year, the pop star seemingly bounced back andannounced a slate of new projects, including an upcoming album, a tour and his documentary series. He dropped his latest single, “Yummy,” on Jan. 3.

The first episode ofJustin Bieber: Seasonsairs at 12:00 p.m. EST on YouTube on Jan. 27. The episodes will air on Mondays and Wednesdays.

For more onJustin Bieber’s Lyme disease battle, pick up the latest issue of PEOPLE, on newsstands Friday.

source: people.com