Justin Bieber and Hailey Bieber are enjoying some "Company" on his 31st birthday with their little one by their side! On Saturday, March 1, the two-time Grammy winner shared a rare look at his life as a new dad, as he posted an adorable snap of himself, the 28-year-old Rhode founder and their 6-month-old baby, Jack Blues. The photo, part of a celebratory Instagram carousel post filled with birthday snaps, shows the 31-year-old proudly lifting up his son as he and Hailey stared lovingly at little Jack. In the image, their son could be seen wearing a cute green onesie and a beanie as well as tiny white socks. Elsewhere in the post, Justin gave fans a behind-the-scenes look at his latest birthday celebration as he smiled alongside several of his closest friends and cozied up with Hailey on the floor of a home. The Rhode founder also posted a short-and-sweet 31st birthday tribute to her Instagram Stories in celebration of her husband's big day. In the image, Hailey could be seen in grey sweats and a knit hat as she hugged Justin from behind, while he apparently recorded some music and sang into a microphone. Behind Justin's buzzcut, their room was decorated with a trio of "happy birthday" balloons, signifying the singer's latest trip around the sun. "31❤️‍🔥," Hailey wrote over the image. Before Justin himself posted about his 31st birthday, plenty of friends and loved ones wished him well on their own Instagram Stories, including The Kid LAROI, Justin's half-sister Jazmyn and singer-songwriter Eddie Benjamin, who called his pal "a person of compassion and truth for many." As for Jazmyn's post, she shared a throwback image of the pair from around 2011, complete with an Instagram filter true to the era. "happy birthday," she wrote, alongside a white-heart emoji. "love you tons." A few of Justin's longtime pals also posted some behind-the-scenes looks at the birthday celebration on Saturday. In snaps posted by longtime friends Maejor, Khalil and Lil Za, Justin could be seen surrounded by pals during the daytime hangout featuring drinks, golf carts and a guitar. Cole Bennett, Kyle Massey, Benjamin and others appeared to be in attendance, as well, per his friends' Instagram Stories. "More life brother! Love you so much," Khalil wrote, alongside images of himself and a smiling Justin. "So grateful for our relationship & look forward to making more memories together! @justinbieber #31." Elsewhere in Khalil's post, Justin — who kept things casual in a black Balenciaga hoodie for the occasion — appeared in good spirits as he laughed with friends while apparently riding a bike of his own. Never miss a story — sign up for PEOPLE's free daily newsletter to stay up-to-date on the best of what PEOPLE has to offer​​, from celebrity news to compelling human interest stories. Justin's birthday celebration comes days after a rep for the musician and his wife slammed "exhausting" allegations of drug use, noting that the past year has been "very transformative" for Justin "as he ended several close friendships and business relationships that no longer served him." The rep added that Justin was focusing on his health and art and was supporting Hailey and their son. They called the false rumors about drug use "pitiful," adding that "despite the obvious truth, people are committed to keeping negative, salacious, harmful narratives alive."