This Sunday afternoon as everyone gears up for a busy night of trick-or-treating, Jennette McCurdy will be headlining the festivities at the Dunkin' Donuts/Baskin-Robbins Family Day. Presented by Parallel Entertainment, the fun takes place from 1:00 to 4:00 PM (CT) at the Curb Events Center on the campus of Nashville's Belmont University and benefits the T. J. Martell Foundation, which funds research aimed at finding cures for cancer, leukemia and AIDs. T.J. Martell has provided more than 240 million to research facilities across America.

"I had known about T.J. Martell for a long time because they are such a source for cancer research," Jennette tells the Boot. "When I found out that they wanted me to participate, I was psyched! And, of course, I wanted to do it because not only is it a perfect cause, but it's a fun event for families. It'll be a blast. They'll have carnival games and ice cream sundaes and little stations with different things. It's Halloween, so kids are going to be in their costumes."

The young singer/songwriter has a personal connection to the cause as her mom, Debbie, is currently battling cancer for the second time. "They just switched her chemo again," Jennette says of her mom's treatment. "She has the best spirit, which I think is a large part of it. She is so optimistic."

"Any organization that does research for cancer is obviously close to my heart," Jennette says of T.J.Martell. "It's great that they also do events like this, where they make something fun and enjoyable, but it's also helping out a cause. People can come and have a great time, but they can also remember what they are there for. It's something unique."

Jennette is looking forward to headlining the first Family Day event and sharing music from her Capitol debut project. "I think it could appeal to a lot of ages," says Jennette, who is especially excited about the younger crowd who will be attending Family Day. "I think everybody is a kid at heart. It's a common thread. Kids are always so great to perform to because they are just so real and are so supportive. When they are excited they'll scream and give you that energy and it's great."

The event will also feature a live auction that will give two lucky people a chance to sit on stage as the 'iCarly' star performs songs from her Capitol Records Nashville EP, 'Not That Far Away.' Fans can also visit the NashvilleFamilyDay website for a chance to win a Baskin Robbins ice cream party with Jennette, along with 14 family members and friends!

Since the Family Day event wraps up before most kids go out to trick-or-treat, Jennette will have the opportunity to indulge in the usual Halloween fun. But since she's 18, might she be getting a little too old for trick-or-treating?

"Wait a minute! No," the petite blond insists with a laugh. "I'm pretty sure I went trick-or-treating last year with some pals."

Jennette also reveals what she's planning to be for Halloween. "A cowboy," she says. "I actually had a costume from the [iCarly] show where I have a mustache and everything, so I was able to borrow that and go literally as a cowboy, not a cowgirl. I've had some fun costumes in the past. I've been Princess Leia and I've been Eloise from the book series."

Family Day will also feature carnival games, a bounce house, an inflatable obstacle course, a gigantic slide, face painting, pumpkin decorating, trick-or-treat booths and a wide variety of other foods and fun.