Holliday (Gwyneth Paltrow), whose unconventional methods include discussing Lindsay Lohan's rehabilitation in Spanish, singing "Conjunction Junction" to her English class, and roleplaying as a bipolar Mary Todd Lincoln for the History class. When Holly first arrives at glee club rehearsal, she impresses the club with her rendition of Cee Lo Green's "Forget You". Rachel is annoyed and worries that Holly may be unable to sufficiently prepare them for the upcoming Sectionals competition. Holly later wins over Rachel by duetting with her on "Nowadays/Hot Honey Rag" from Chicago. Kurt neglects his best friend Mercedes Jones (Amber Riley) in favor of his new friend Blaine Anderson (Darren Criss). Mercedes is offended when Kurt tries to set her up on a date with a football player on the basis that they are both black, and feels left out when she accompanies Kurt and Blaine to dinner, where conversation is dominated by gay issues and icons. When Sue begins a healthy eating initiative and declares a ban on "Potater Tots", Mercedes organizes a student protest and fills the tailpipe of Sue's car with Tots, causing $17,000 worth of damage. Sue's initiative proves popular with the students' parents, and her appointment as principal is made permanent. She fires Figgins (after she finds inappropriate emails on his computer) and Will who is later visited by Holly seeking advice. Holly feels out of her depth as a teacher, having enabled Mercedes' behavior. She confesses that she originally took her work seriously, until a student (Lindsay Sims-Lewis) punched her in the face, prompting her more laid-back approach. Terri arrives while they are talking and is angered by Holly's presence. Will asks her to leave, telling her that their reunion was a mistake and concluding their relationship for good. Kurt confronts Mercedes, suggesting that she is substituting food for love and their friendship for a romantic relationship. Mercedes decides to talk to the student Kurt attempted to set her up with. As she departs, Kurt is approached by school bully Dave Karofsky (Max Adler), who threatens to kill him if Kurt reveals his closeted homosexuality. At the urging of the glee club members, Sue reinstates Will. He suggests a group performance of "Singin' in the Rain", but asks for Holly's help to modernize it, resulting in a mash-up with Rihanna's "Umbrella". Production Paltrow's Glee appearance marked her first ever scripted-series guest performance. The role of Holly was created for