Nick Carter is in a sad state because his brother, Aaron Carter, died.

The 42-year-old Backstreet Boys member went on social media on Sunday to talk about how sad he was that Aaron had died the day before at the age of 34.

Nick posted a bunch of pictures of the brothers when they were younger along with a long, detailed caption on Instagram.

“My heart has been broken today,” the post began. “Even though my brother and I have had a complicated relationship, my love for him has never ever faded. I have always held onto the hope, that he would somehow, someday want to walk a healthy path and eventually find the help that he so desperately needed.”

The post continued, “Sometimes we want to blame someone or something for a loss. But the truth is that addiction and mental illness is the real villain here. I will miss my brother more than anyone will ever know. I love you Chizz., now you get a chance to finally have some peace you could never find here on earth….God, please take care of my baby brother.”

Aaron and Nick had a rough time getting along with each other in the years before the singer died.

Back in 2019, Nick said that he and his sister Angel had asked the court to stop Aaron from coming near them. Nick said in a statement that Aaron was planning to kill his wife and their unborn child.

“After careful consideration, my sister Angel and I regret that we were required to seek a restraining order against our brother Aaron today,” Nick wrote at the time. “We were left with no choice, but to take every measure possible to protect ourselves and our family.”

Nick kept talking about how much he loved Aaron, saying that he hoped Aaron would get “the right treatment he needs before he or anyone else gets hurt.”

On the same day as the restraining order, Aaron replied on Twitter with the following: “So my brother just got a restraining order against me. And I was just served lol.”

“Take care. @NickCarter we’re done for life,” he continued. “I haven’t seen him in four years. And I don’t intend to … I am astounded at the accusations being made against me, and I do not wish harm to anyone, especially my family.”

Aaron first got a lot of attention when his self-titled debut album came out in 1997. After this, Aaron’s Party (Come Get It), Oh Aaron, and Another Earthquake! (2002) were all released.

“Aaron’s Party (Come Get It),” “That’s How I Beat Shaq,” and a cover of “I Want Candy” by The Strangeloves were some of his early hits. All three of these songs were very popular and did very well. Before Aaron went on his first solo tour in 2000, he opened for groups like the Backstreet Boys and Britney Spears.

Aaron Carter, his brother Nick, and their three other siblings, Bobbie Jean, Leslie, and Angel, were all on the 2006 season of their E! reality show House of Carters. Aaron was on Season 9 of Dancing with the Stars in 2009. He and his partner, Karina Smirnoff, came in fifth place.

Aaron had switched to rapping in recent years. In 2018, 16 years after his last album came out, he released “L.V.,” his fifth and last studio album.

One of the young man’s many skills was being able to act. He was in the TV shows Lizzie McGuire and Sabrina the Teenage Witch. He was also in the movies Fat Albert, Popstar, and Supercross.

In 2001, he made his Broadway debut in the musical Seussical the Musical, which starred JoJo. In 2011, he was in an off-Broadway production of The Fantasticks.

When he died, his fans all over the internet, including famous people, took to social media to talk about how sad they were about it.

“Fame at a young age is often more a curse than a blessing and surviving it is not easy,” songwriter Dianne Warren shared on Twitter. “RIP Aaron Carter.”

In a blog post, One Tree Hill actor Tyler Hilton said that the news was “heartbreaking” because he had known Carter for “years” and grown to like him. In 2019, Hilton and Carter went on tour together as part of the Pop2K Tour. During one of their shows, Hilton and Carter both played Carter’s hit song, “I Want Candy.”

“Known him for years and always really liked him, he was warm and really funny,” Hilton shared on Twitter. “Loved putting on a show and he was good at it. I’ll find some pics of us and post more later… damn RIP budddd.”

“Sending love to the family and friends and fans of #AaronCarter. Rest In Peace!” wrote Melissa Joan Hart with a throwback picture of the pair together from their youth.

“Incredibly sad about the passing of Aaron Carter. My thoughts and prayers go out to his friends and family,” tweeted Disney alum Christy Carlson Romano.

Billy Gilman posted a picture from the past to his Instagram Story and wrote part of the following caption: “I am gutted by this one. You were truly a musical genius, and I could never just be that.”