She tells Larry King her 5-month-old makes it important for her to "get excited about this election"

By Joey Bartolomeo
Updated June 26, 2008 11:15 AM

Christina Aguilera is urging Americans to vote – and she’s using her 5-month-old son, Max, to help spread the word.

Mom and son will star in an upcoming Rock the Vote public service announcement, the pop star, 27, said on Wednesday night’s Larry King Live.

“It was really important for me to get involved and get excited about this election in particular,” said Aguilera, “being such one of change and new development for our country and for the future of my son.”

In the PSA, Aguilera holds Max and sings “America the Beautiful.” It’s a takeoff on a 1992 Rock the Vote commercial with Madonna wrapped in the American flag.

“But instead of wrapping myself,” explained Aguilera, “I would wrap my son, sort of pass it on to the next generation.”

The singer revealed that she restrained her powerful voice this time around. “Since I’m holding my son, I’m not going to, you know, belt in his face or anything like that,” she said. “But it was really, really nice to bring it down to a really intimate moment between me and my son.”

Aguilera didn’t mind putting Max in the spotlight since she says he’ll end up in the public eye anyway – and it’s for a good cause. “What a great way to sort of subject him in such a positive way [and] do something as positive as getting people to vote,” she said.

Ironically, Aguilera admitted that she didn’t cast her first ballot until 2004.

“As a woman, that’s embarrassing for me that it took me that long just because . . . we weren’t always given that right,” said Aguilera, adding that politics weren’t discussed in her house when she was a kid. “And I think it’s really taken for granted, especially with the younger generation now, you know?”

As for Barack Obama vs. John McCain, Aguilera declined to endorse either, saying, “It’s just exciting, all the way around.”