(CNN) -- Rap star T.I. threw himself a going-away party Sunday night, less than two days before he was scheduled to begin serving a prison sentence on federal weapons charges.



T.I. performed to a packed crowd Sunday, days before he was to start a prison term.



The Grammy-winning rapper performed at Atlanta's Philips Arena before a packed house. He is scheduled to head to prison Tuesday to start a 366-day sentence.



During Sunday's concert, the 28-year-old reiterated a message that's become familiar in recent weeks: He wants others to learn from his mistakes.



"I'm doing the best I can to get out there, man, and put something positive on these young kids, man," T.I. said during the show. "I try my best. I need y'all help, though."



The rapper played to a sell-out crowd of 16,000 people, said Kenan Woods, a spokesman for the arena. T.I., whose given name is Clifford Harris, played through much of his catalog, including the hits "Whatever You Like," "Live Your Life" and the Grammy-winning "Swagga Like Us," Woods said.



At times in the show, Harris was joined on stage by fellow rapper Soulja Boy and by his five children and mother, Woods said.



He was greeted by a welcoming crowd, and some members of the audience held up signs supporting him.



Tickets for the show started at just $10, according to the arena, which called the event "T.I.'s Final Goodbye Bash."



Harris has been the subject of an MTV reality show, "T.I.'s Road to Redemption," in the lead-up to the prison term.



He was sentenced in March on weapons charges related to purchasing machine guns and silencers. In addition to serving prison time, T.I. was placed on house arrest, was given community service and was ordered to pay a $100,300 fine.



Though he had been in legal trouble before, Harris' current situation began when he was arrested just hours before he was to perform at the BET Hip-Hop Awards in Atlanta.



The rapper had provided a bodyguard with $12,000 to buy weapons. Harris was not permitted to own any guns, however, because he was convicted in 1998 on felony drug charges -- possession of crack cocaine with intent to distribute -- in Cobb County, in suburban Atlanta.



After his arrest, he entered a plea agreement, which federal authorities called unique because it allowed the rapper to remain out of prison for a year while he performed community service.



Harris has already left a strong mark on the hip-hop genre, music experts told CNN, which should position his career well when he is released. Harris had been named to the Forbes list of top-earning rappers, making an estimated $16 million in 2006.



Some music industry observers have said T.I.'s prison term will only make him more popular.



"I think that if anything, it will gain him more fans and actually support his fan base, because he's talked about making a mistake," Emil Wilbekin, editor in chief of Giant Magazine, told CNN. "He's talked about taking care of the error of his ways."



The Atlanta rapper has expressed remorse for the situation.



"I would like to say thank you to some and apologize to others," he said at his sentencing in March. "In my life, I have been placed in the worst-case scenario and had to make the best of it."



In a March interview with CNN's T.J. Holmes, Harris said he no longer felt like he needed to carry weapons to protect himself. He said people should not idolize him for what he's gone through, but should take note of the fact that he has taken responsibility for his actions.



"You shouldn't take the things that I've gone through, and the negative parts of my life, and admire me for that. If anything, admire me for how I've accepted responsibility for the part
What did T.I. do two days before his prison term started? When will T.I. prison term start? who performed on sunday To what was the rapper sentenced? What was T.I. convicted for? How long is his prison term?
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question: What did T.I. do two days before his prison term started?, answer: performed to a packed crowd | question: When will T.I. prison term start?, answer: Tuesday | question: who performed on sunday, answer: T.I. | question: To what was the rapper sentenced?, answer: federal weapons charges. | question: What was T.I. convicted for?, answer: federal weapons charges. | question: How long is his prison term?, answer: 366-day sentence.