Michelle Trachtenberg

Michelle Trachtenberg and Mathew St. Patrick (Celeste & Keith)

Michelle Trachtenberg will play a pop star, guarded by Michael St. Patrick’s character Keith, in four episodes.

"The coolest part was in one of the episodes, my character goes on the ’Ellen’ show," Trachtenberg told reporters about Ellen DeGeneres’ talk show. "So Ellen and I did this whole like improv routine where I’m talking about my character. That was really cool. I got to do a whole little fun thing. Ellen’s awesome, awesome lady."

Michelle quotage : "My outfits are like Showgirls on crack," Trachtenberg says. "At one point I slipped out of my shirt and Mathew was trying to keep a straight face,"

Autopsy: Celeste is a young pop star that Keith (Mathew St. Patrick) is assigned to guard. Trachtenberg describes Celeste as the embodiment of every pop princess’s worst qualities: "She’s Britney (Spears) in her attitude, with Jessica Simpson, Christina Aguilera and a little bit of J. Lo in her dress. She’s sugar-coated on the outside, but an evil little witch on the inside."

Unusual findings: Celeste has a thing about her toilet being used by anyone else.

Our sympathies go out to: Keith. "Any way Keith steps out of line - even if he addresses me incorrectly - I jump on him for it," says Trachtenberg.

Cherished memory: "My outfits are like Showgirls on crack," Trachtenberg says. "At one point I slipped out of my shirt and Mathew was trying to keep a straight face."

Trachtenberg’s former life: She was Sarah Michelle Gellar’s kid sister, Dawn, in Buffy the Vampire Slayer.