Monaco has appeared in various reality TV series such as The Girls Next Door, Keeping Up with the Kardashians, and Big Brother 14.
In 2007, Monaco appeared in three episodes of Up Close with Carrie Keagan, an episode of Model Dating: Hawaii and on an episode of Jimmy Kimmel Live! Branching off from reality television, Monaco portrayed Michelle in two episodes of the soap opera Passions.
Monaco continued to make guest appearances in The Girls Next Door throughout 20.
Song entered the Big Brother house in 2003 for the 4th season of the show.
She was one of the five houseguests to have an ex, Jee Choe, enter the house as an antagonist.
Monaco is a former competitive gymnast, and has spent time as a dance team coach in addition to her fitness video work.
She also worked at Disney World, where she was one of the performers who portrayed Cinderella and Snow White in the resort.On day 33, Song survived eviction and Varela was unanimously evicted.On day 43, Song won the Power of Veto and did not use it, securing Head of Household Erika Landin's plan to evict Justin Giovinco, the houseguest they viewed as the biggest threat in the game.Her disappearance from the house played a part in the Veto competition, which was held before nominations for a second time that season, as the houseguests had to guess where Song was.At her return, Song nominated her ex, Jee Choe, and strategically put up her ally and POV holder, Irwin, alongside Choe to prevent Irwin from potentially using the POV to save either nominee, as well as to hide their alliance.Monaco appeared in FHM and Men's Fitness magazines.