Blake Shelton is commemorating the 25th anniversary of his brother's death with a heartfelt message.

The king of country took to Twitter to share some sweet words about his older brother, Richie Shelton, who died in a car crash when Blake was only 14 years old.

"Wow... 25 years ago today we lost my brother Richie Shelton," he wrote. "He's still my hero going strong. Wish everyone could've known him."

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When Shelton and his ex-wife, Miranda Lambert, won the Song of the Year award at the 2012 CMA Awards for her smash hit, “Over You,” Shelton revealed to the audience that the tune was written for his late brother.

"I lost my brother in a car wreck when I was 14 years old," Shelton said during his acceptance speech. "Later in life, when I decided I wanted to be a country singer, my dad always told me, 'Son, you should write a song about your brother.' I lost my dad in January, and it’s so amazing to me that tonight -- even after he’s gone -- he’s still right."

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Lately, Shelton has been all-smiles since going public about his romantic relationship with fellow Voice coach, Gwen Stefani.In this week's first round of live episode on the NBC musical competition, Shelton wasted no time getting close with Stefani.

During multiple commercial breaks, both singers were "beaming and couldn’t stop smiling at each other." It's no wonder that former Voice coachChristina Aguilera totally approves of the duo's new relationship.

"I do know from my own personal experience how difficult divorce can be," Aguilera told ET on Thursday. The 34-year-old singer added, "They deserve happiness."