À la télévision, après plusieurs apparitions dans des séries comme 30 Rock, elle obtient pour la première fois un rôle important, celui d'April Ludgate dans la série Parks and Recreation.
It eventually caused Arsenio Hall to lash out on her in the show's boardroom segment, berating her with the unanimous support of his team, particularly Clay Aiken.
This left O'Day in tears and contemplating to quit the show before eventually being fired by Trump.
The band became known as Danity Kane, and their first album debuted on August 22, 2006, at #1 on the Billboard 200 charts.
Combs bluntly accused O'Day of trying to expand her fame at the expense of the entire group, and that she liked flaunting her breasts and wearing big hair, referring to an incident where she had rubbed her cleavage on the arm of a television host.
Diddy, O'Day was fired from the group in 2008, but reunited with them in 2013 before a second disbandment.