Michelle McCool is known on SmackDown! with the gimmick of a personal trainer (an actual former job of hers) to the SmackDown! superstars. Unlike most other "Rookie Divas" who participated in the 2004 Diva Search, Michelle's primary reason for joining WWE is to develop enough skills to become an actual professional wrestler.
McCool competed in the 3-part "2005 Rookie Diva Contest" at the 2005 No Way Out PPV against Lauren Jones, Rochelle Loewen, and Joy Giovanni (Giovanni was announced the winner). During the contest, Dawn Marie served as an MC, along with Torrie Wilson. Each contestant was asked to show what their talents were as part of the competition. Dawn Marie mostly responded harshly towards each of the competitors. McCool body-slammed Dawn Marie as a result of her words. This sparked a short-lived feud between the two.
A few months later, McCool began a feud with Melina for teasing her friend, Heidenreich. In their first match, Melina defeated McCool by gaining leverage from the ropes. Immediately after the match, Melina ordered her clients Johnny Nitro and Joey Mercury to perform the Snapshot on the unconcious Michelle.