Two Hawaii brothers are back on national TV tonight, and local entertainment news is otherwise mixed — good for Hawaii music fans, worrying for Dolly Parton's.

• Zyah Music and Nyjah Rhythm perform tonight on America's Got Talent, after a first appearance a few weeks ago that won over the crowd.
• The pair have been working with a vocal coach and recording new music in Los Angeles.
• The 44th Hawaiian Slack Key Guitar Festival lands Saturday at the Waikiki Aquarium, with Ledward Kaapana, George Kuo, and Jeff Peterson on the bill.
• Dolly Parton says she is dealing with health problems she ignored while caring for her late husband Carl, who died last year.
• At 80, Parton is still making music, but announced a new Dollywood ride by video instead of showing up in person.

Outlook: Tonight's performance decides whether the brothers advance, and fans will be watching Parton's schedule for more signs about her health.