A cause of death has not been revealed, but the star struggled with his mental health and addiction over the years.
Though the I Want Candy hitmaker had a tumultuous relationship with his siblings – both Nick and his twin sister, Angel, filed a restraining order against him in 2019 – the Backstreet Boys singer took to Instagram Sunday saying: “My heart is broken.”
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He added: “Even though my brother and I have had a complicated relationship, my love for him has never ever faded.”
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