The friends got together in the studio on the series finale of Oxygen TV's All About Aubrey to help boost O'Day's new solo career.
They had become firm friends in 2005 during MTV's Making The Band, which documented rap mogul Diddy's big search for a new girl group. But their dreams were shattered when the band fell apart only a few years later.
O'Day, a 27-year-old Playboy model, endured a very public split with her mentor Diddy and hasn't been shy about sharing her struggles with getting a new recording contract during her reality TV show.
'I may not be able to bring Danity Kane back,' she told viewers. 'But Aubrey and Aundrea aren't going anywhere. I love every minute I spend with her in the studio.'