Dierks Bentley's superstar career is the envy of many, but when the Arizona-born country singer-songwriter spends holiday time with his family, it's younger brother, Fife, who gets -- and deserves -- more of the attention.

"When I go home for Christmas, you'd think that in my house I'd be the big star, but I'm not," Dierks says in a special holiday episode of the DBTV video series on his website. "My brother is the big star because while I'm out here on the road playing music, my brother's actually on the road down in Guatemala literally saving peoples' lives and changing people's lives."

Fife spends his time in the developing Central American country working with those in desperate need of medical attention. "There really is no form of health care system, or access to health care," Dierks explains of his brother's mission. "He went down to work with the Peace Corps. He ended up working with a company called Partner for Surgery. Ninety percent of rural children in Guatemala suffer from malnutrition."

Dierks' New Year's resolutions will undoubtedly include plenty of musical ambitions, but his aspirations pale in comparison to what his baby brother has as a goal for the new year.

"They want to perform 800 surgeries," the singer reveals, having received a text from Fife outlining the charitable organization's plans. "They want to have 100 children on the nutrition program; they want to have 1,000 midwives trained, 4,000 women screened for cancer and 40 nurses trained in preventative cancer treatment."

To donate to Parter for Surgery, click here, or text JAKE to 50555 to donate $10.

Dierks has a few more concert dates on his 2012 calendar, and will play a New Year's Day show in Orlanda, Fla. See his schedule here.

Watch Dierks' Latest DBTV Webisode

More From TheBoot