Grammy-winning performer Usher visited the U.S. Capitol Wednesday to meet with lawmakers about treatments for type 1 diabetes one week after meeting with Apple CEO Tim Cook to discuss the topic.

Usher’s son was diagnosed with the disease at age 6, and the R&B singer is an outspoken advocate for those afflicted with the disease.

He’s also a spokesman for Sanofi, a French drugmaker and one of the largest producers of insulin.

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Usher’s trip to the Capitol included a meeting with House Minority Leader Hakeem Jeffries, New York Democrat, and other lawmakers to discuss health care policy, a legislative aide told The Washington Times. 

According to Fortune, Sanofi executives were to join the meetings “to discuss the importance of early screening” for the disease. 

Usher entered the Capitol through the Senate basement and was escorted by Sen. Raphael Warnock, Georgia Democrat, to a small meeting room on the House side. 

Donning a casual brown suit and dark sunglasses, the superstar made his way across the Capitol mostly unnoticed by throngs of tourists. He was protected by a pack of security personnel and legislative aides.

Usher declined to comment when asked by a reporter about the purpose of his visit but provided a charming grin. 

Mr. Warnock and Usher stopped briefly on the first floor to view a civil rights exhibit in the hallway, then ducked into an office dedicated to Rep. Joseph Rainey, a former slave and South Carolina Republican who in 1870 was the first Black American elected to the House.

According to Fortune, Usher “brainstormed type 1 diabetes awareness ideas” with Apple’s CEO Cook last week and said he planned to take his ideas to Capitol Hill.