If you can believe what rockers say to their crowds during concerts then we can believe that Good Charlotte’s Joel Madden popped the big question to Nicole Richie.  It would be the third big event in Nicole’s life this year: pregnancy, jail, and engagement.

Sources who attended the Hot 99.5 concert last night featuring Good Charlotte at the Clarendon Ballroom tell us Joel told the crowd he had just proposed to his jail-bound baby mama on Thursday.

Congrats to Joel, Nicole and the baby in the carriage!