After training in the United States after "Cry Eye", Son Dam Bi returned to Korea and released a mini album, Son Dambi Mini Album Vol.1, with a focus on electronica (departing from her previous style of crunk pop) on April 29, 2008. The lead title was "Bad Boy", produced by Brave Brothers. Also, Kahi (leader of After School) was her dance teacher, and is also featured in the Bad Boy music video.
In September 2008, she returned with the single "미쳤어" ("Crazy"). The song featured a "chair dance" that has become popular with the Korean public; it has since been upgraded to a "sofa dance". The dance has been copied and parodied by many people, including Hyun Young, Infinity Challenge comedy team member Noh Hong-cheol, comedienne Shin Bong-sun, and Lee Soo Young.
Her follow-up song in 2009, "Toyoilbamae" (Korean: "토요일밤에", "On a Saturday Night"), was a success.
She then released her next EP, The Queen, which was not as well-received as her previous hits; she faced netizen criticism for her vocals, as well as accusations of plagiarism for "Queen", the lead single from the EP.