In 2004, Fimbres auditioned in Los Angeles for the first season of Making the Band 3 – the same audition as fellow band member Aubrey O’Day. They met at the audition, which subsequently led to their friendship. At the final audition, not only was Fimbres successful but she was the first contestant to make it into the house.

Danity Kane’s first studio album, Danity Kane was released in 2006 and achieved success in the United States, shipping a million copies domestically,. Two singles from the album were top 10 hits, “Show Stopper”, and the ballad, “Ride for You”. Their second studio album, Welcome to the Dollhouse, was released on March 18, 2008, following the release of their second top 10 hit single “Damaged”. The band became the first female group in Billboard history to have their first two albums open at the top of the charts.

The season finale of Making the Band October 14, 2008, confirmed the departure of O’Day and D. Woods. With bandmate Shannon Bex deciding not to continue within the group and declining to return to film the show’s 2009 season, Fimbres and Dawn Richard were the only two returning members for the group and the series. The group’s break up was confirmed in January 2009. However, they were shown on air as being completely over in April 2009, where Fimbres was “officially” released from her Bad Boy Records contract by Combs in the April 16, 2009, episode of the series.

In June 2010, an original Fimbres song was leaked on the Internet titled “Brush You Off”. Later, this song was revealed to be a demo that Fimbres had made in 2006. In August 2010, with former Danity Kane bandmate, Aubrey O’Day, she revealed via Ustream that both had recorded a track titled “Ego Trip” to be included on Aubrey O’Day’s solo album, but was later taken off the album before it was released. They also answered some fan questions about the band’s split.

In 2010, Fimbres began performing and touring with Soto, a Latin/funk/R&B band from Norwalk, California.

Fimbres’ sings in a song called “Dip With You” on Baby Bash’s album, Cyclone. She also appeared as Dorothy in Oz: The Musical, alongside Nathaniel Flatt of V-Factory, from December 4–13, 2009. On December 30, 2010, a snippet of the O’Day and Fimbres’ collaboration, “Ego Trip”, was leaked on the Internet, but the track was never finished.

On March 11, 2011, Fimbres made an appearance on O’Day’s reality show, All About Aubrey, where they recorded a song titled “Ego Trip” for O’Day’s solo album to be released in 2011, although their single was never released. In the episode, according to O’Day, Fimbres drops out of a show she would do with O’Day, telling O’Day that she did not want to be in the business anymore.

In 2012, Fimbres was named executive producer of J-Live Entertainment’s Next Big Thing Talent Show.

In mid-2013, there were rumors that Danity Kane would be reuniting. On August 25, 2013, Danity Kane appeared at the 2013 MTV Video Music Awards (without D. Woods, who did not return to the group), announcing they were back together.

On May 15, 2014, the band’s first official reunion single “Lemonade” was released on the internet via Official Danity Kane Soundcloud. The single was produced by The Stereotypes, and features rapper Tyga over a production sampled from Grindin’, the 2002 hit song by Clipse

On May 16, 2014, on the first night of their #NOFilterTour at The Fillmore in San Francisco after performing several songs with Danity Kane, Fimbres announced that she would be leaving the group at the end of their tour, and Aubrey O’Day, Shannon Bex, and Dawn Richard would be continuing on as a trio.

In 2015, Fimbres appeared on her former band member Dawn Richard’s third studio album Blackheart on a song entitled “Phoenix”. The record was previously written and recorded for their upcoming album DK3 but soon after completion Danity Kane reportedly passed on the song. Richard has stated that she was about to sell the record to another artist when Aundrea convinced Richard to not only keep the record for her album Blackheart but also keep Fimbres’ verse on the song because they had both always loved the song from the beginning.