"I'm excited," Jonas, wearing a tailored gray suit, told PEOPLE on his way to the White House where he planned to pay a visit to President Barack Obama and a group of kids who live with diabetes. "This is the first time I'm meeting the president. It's gonna be fun."
But the singer's Washington, D.C., trip is not all glitz and glamour. The 16-year-old, who played at the Kids' Inaugural Ball after the November election, is taking a detour from his Jonas Brothers tour to testify Wednesday at a Senate Homeland Security and Government Affairs Committee hearing on government funding for diabetes research, as are Sugar Ray Leonard and Mary Tyler Moore.
"It's amazing [to meet them]. They're, like, household names," says Jonas, who was diagnosed with diabetes at age 13 and who works with the Juvenile Diabetes Research Foundation.
Passed SecurityStill, even a household name like Nick Jonas had to show the Secret Service his passport before being admitted onto the White House grounds. Nick's appearance Wednesday was a surprise to the diabetic children meeting the President. And many kids seemed more excited to meet him than Obama.
Leaving the White House, kids screamed, "Nick Jonas! Nick Jonas! We got to meet Nick Jonas!!!" and showed off autographs.
"That's cool," says Jonas, who shook everybody's hand and briefly met the president.
"It was great," he told PEOPLE outside the Executive Mansion. "He came up and thanked me for meeting his daughters and playing for them. I said, 'It's a pleasure to meet you.' He said, 'It's a pleasure to meet you, too.' Then we took a picture with about 100 kids."
So did Nick's dad get to talk to the president, too? "Nope," says Kevin Jonas, Sr. "I just watched as a proud Dad."
On Tuesday afternoon, Jonas plans to tour Capitol Hill and meet with House Speaker Nancy Pelosi before testifying before the Senate Wednesday.