Aaron Carter Reveals He Had 'Top Secret' Surgery

Aaron Carter looks to be recovering well after getting out of a secret surgery. The 29-year-old singer was filmed while greeting fans on a TMZ tour bus and explained to the passengers that he had just gone under the knife.

On Tuesday, the "Sooner or Later" hitmaker was spotted driving around Los Angeles with his girlfriend. Carter then pulled over to the side of the road to say hello to the bus passengers.

Up Next: Aaron Carter's Family Is Reportedly 'Concerned' for Him

From the start, the younger brother of Backstreet Boys star Nick Carter was speaking out about surgery and anesthesia. Even though he admitted that he had just come out of surgery, Carter wasn't willing to spill on what kind of procedure he had done. Watch the video of Carter after his surgery above.

Last month, Carter was arrested for driving under the influence in Georgia. Given his run-in with the law and allegations of drug use, Carter's family is reportedly "worried" about him.

"The whole Carter family is concerned for Aaron. They're worried," a source said while talking with Us Weekly.

More: Aaron Carter Had Another Incident With Police Hours Before DUI

"To my brother: I love u no matter what & if u feel the need to reach for help, I am here and willing to help you get better," brother Nick tweeted.

Carter did not respond well to his brother's message.

"If my own blood truly cared about my well-being, why wouldn't he call me directly and have a conversation instead of making this about him through a very public forum? That's not cool at all to use me for his PR and kick me while I am down. I love my family despite it through thick and thin," he said.

As for the Carter family, they aren't able to easily reach out to Aaron.

"Nick doesn't have his phone number. Aaron blocks everyone and changes his number so none of his family can get in touch with him. He changes his number a lot," the source said.

In a television interview following his arrest, Carter defended himself.

"I don't need help. What I need is for people to understand that I'm human and I make mistakes just like every other human in this world, but I would never risk my life or my girlfriend's life. I do not drink. Hire a polygraph person, a professional. Strap me up," he said.