updated 03/22/2011 AT 7:00 PM ET
•originally published 03/22/2011 AT 4:30 PM ET
Chris Brown’s latest album F.A.M.E. may signify a new beginning for him, but the singer can’t seem to avoid questions about pleading guilty to felony assault against ex-girlfriend Rihanna almost two years ago.
Brown, 21, who lost his temper Tuesday morning after an interview on Good Morning America with Robin Roberts in which she asked about Rihanna, “is upset” by what transpired on the show, a source tells PEOPLE.
“He’s been trying to move on from his past and focus on his music, and he’s finally putting out an album,” the source says. “Why can’t we focus on that? He makes great music and he loves his fans. He’s a good kid.”